Evaluation and Management of the Infant Exposed to HIV in the United States
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CLINICAL REPORT Guidance for the Clinician in Rendering Pediatric Care Evaluation and Management of the Infant Exposed to HIV in the United States Ellen Gould Chadwick, MD, FAAP,a Echezona Edozie Ezeanolue, MD, MPH, FAAP,b,c COMMITTEE ON PEDIATRIC AIDS Pediatricians play a crucial role in optimizing the prevention of perinatal abstract transmission of HIV infection. Pediatricians provide antiretroviral prophylaxis to infants born to women with HIV type 1 (HIV) infection during pregnancy and to those whose mother’s status was first identified during labor or delivery. Infants whose mothers have an undetermined HIV status should be tested for a Department of Pediatrics, Feinberg School of Medicine, Northwestern HIV infection within the boundaries of state laws and receive presumptive University and Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois; bHealthySunrise Foundation, Las Vegas, Nevada; and HIV therapy if the results are positive. Pediatricians promote avoidance of c Department of Pediatrics, College of Medicine, University of Nigeria, postnatal HIV transmission by advising mothers with HIV not to breastfeed. Nsukka, Nigeria Pediatricians test the infant exposed to HIV for determination of HIV infection Clinical reports from the American Academy of Pediatrics benefit from and monitor possible short- and long-term toxicity from antiretroviral expertise and resources of liaisons and internal (AAP) and external reviewers. However, clinical reports from the American Academy of exposure. Finally, pediatricians support families living with HIV by providing Pediatrics may not reflect the views of the liaisons or the counseling to parents or caregivers as an important component of care. organizations or government agencies that they represent. The guidance in this report does not indicate an exclusive course of treatment or serve as a standard of medical care. Variations, taking into account individual circumstances, may be appropriate. All clinical reports from the American Academy of Pediatrics INTRODUCTION automatically expire 5 years after publication unless reaffirmed, revised, or retired at or before that time. Each year approximately 8500 women with HIV infection give birth in the United States.1 Through the implementation of effective, cost-saving2 This document is copyrighted and is property of the American Academy of Pediatrics and its Board of Directors. All authors have filed preventive strategies during pregnancy, the rate of perinatal transmission conflict of interest statements with the American Academy of of HIV has remained low at ,1% to 2%.1 These preventive strategies Pediatrics. Any conflicts have been resolved through a process approved by the Board of Directors. The American Academy of include (1) the provision of universal opt-out HIV testing for all pregnant Pediatrics has neither solicited nor accepted any commercial women and for those who have HIV infection, administration of involvement in the development of the content of this publication. combination antiretroviral therapy (ART) during pregnancy and labor; DOI: https://doi.org/10.1542/peds.2020-029058 (2) planned cesarean delivery before the onset of labor and rupture of Address correspondence to Ellen Gould Chadwick, MD. membranes for pregnant women with an HIV viral load of .1000 copies E-mail: EGChadwick@luriechildrens.org per mL before delivery; (3) provision of antiretroviral prophylaxis to the PEDIATRICS (ISSN Numbers: Print, 0031-4005; Online, 1098-4275). infant exposed to HIV for 4 to 6 weeks; and (4) complete avoidance of Copyright © 2020 by the American Academy of Pediatrics breastfeeding. Perinatal transmission occurs mostly when there is failure of implementation of these strategies, outlined in a separate 2008 American Academy of Pediatrics (AAP) policy statement titled “HIV To cite: Chadwick EG, AAP COMMITTEE ON PEDIATRIC AIDS. Evaluation and Management of the Infant Exposed to HIV Testing and Prophylaxis to Prevent Mother-to-Child Transmission in the in the United States. Pediatrics. 2020;146(5):e2020029058 United States.”3,4 This clinical report offers guidance on the evaluation and Downloaded from www.aappublications.org/news by guest on December 30, 2020 PEDIATRICS Volume 146, number 5, November 2020:e2020029058 FROM THE AMERICAN ACADEMY OF PEDIATRICS
management of infants born to during the current pregnancy) should to breastfeed is also made during the women with HIV infection. have HIV testing repeated in the third prenatal period. The current US In addition to standard clinical care trimester.8 A plasma HIV RNA test is Department of Health and Human for the newborn infant, it is important recommended in addition to routine Services (HHS) Panel on Treatment of that appropriate steps are taken for antigen/antibody immunoassay Pregnant Women With HIV Infection early detection of HIV infection, testing when the possibility of acute and Prevention of Perinatal appropriate vaccines are retroviral syndrome is suspected in Transmission (Perinatal Guidelines administered, and adequate a pregnant woman.9 Panel) recommends the use of counseling is provided to families a combination of at least 3 living with HIV infection. The antiretroviral drugs during pregnancy TESTING OF THE INFANT WHEN THE management of infants in whom and labor for all pregnant women MOTHER’S HIV INFECTION STATUS IS HIV infection is diagnosed should UNKNOWN with HIV infection regardless of the be undertaken in consultation plasma HIV RNA viral load or CD41 When the HIV status of the mother is T-lymphocyte count.11 with a pediatric HIV specialist. unknown, expedited HIV testing This report updates previous AAP should be performed on the infant recommendations.5 Interventions During Labor and at after consent procedures consistent Delivery with state and local law. Expedited IDENTIFICATION OF MATERNAL HIV HIV antigen/antibody testing allows Pregnant women with HIV infection INFECTION timely identification of HIV infection generally continue the routine dosing in women whose HIV status is schedule of their ART regimen during Although there has been a dramatic labor if possible. Intravenous decrease in the number of new HIV unknown late in pregnancy, during labor, or in the immediate postpartum zidovudine (ZDV), also known as infections in infants in the United azidothymidine (AZT), is added for States since 1994, when antiretroviral period and is generally available on a 24-hour basis at all facilities with pregnant women with HIV RNA prophylaxis was first documented to .1000 copies per mL close to prevent perinatal transmission, maternity services and/or a neonatal care unit. Positive HIV antigen/ delivery and may be considered for transmission continues to occur, RNA levels between 50 and 999 albeit rarely.1 Documented cases of antibody test results should be urgently reported to health care copies per mL, but it is no longer perinatal transmission declined recommended for pregnant women rapidly after the adoption of the providers so that presumptive HIV therapy can be initiated in the infant with documented HIV RNA levels recommendation by the Centers for ,50 copies per mL near delivery.12 Disease Control and Prevention as soon after birth as possible and ideally within 6 to 12 hours of life. In Planned cesarean delivery before (CDC), the AAP, and the American labor and the rupture of membranes College of Obstetricians and addition, breastfeeding should be postponed, and the infant should be at 38 weeks’ gestation is Gynecologists for routine HIV testing recommended for all pregnant for all pregnant women in the United given formula feedings. If supplemental test results are women with HIV RNA levels of States. HIV testing is now part of $1000 copies per mL near the time routine prenatal care in most states negative, antiretroviral drugs should be stopped, and breastfeeding may be of delivery regardless of maternal HIV unless the patient declines, which is treatment.13 Cesarean delivery solely also known as “opt-out” consent or reinstated.8 for the prevention of transmission is “right of refusal.”6,7 A second HIV test not recommended for pregnant during the third trimester, preferably STRATEGIES FOR PREVENTION OF women with HIV RNA levels ,1000 before 36 weeks’ gestation, has been PERINATAL HIV TRANSMISSION copies per mL because of the low risk found to be cost-effective even in low- of perinatal transmission of HIV in prevalence areas and should be Maternal Treatment During Pregnancy this group and the increased risk of considered for all pregnant women.2 complications with a major surgical In particular, pregnant women at high Most women with HIV infection in the procedure.13 risk for incident HIV infection (eg, United States have access to free those who are incarcerated, reside in prenatal care, which allows for the Women who present in labor with communities with an HIV incidence initiation of effective ART in women unknown HIV status should receive greater than 1 per 1000 per year, in whom HIV is newly diagnosed or expedited HIV testing with inject drugs, exchange sex for money continuation of treatment in those a combined HIV antigen/antibody or drugs, are sex partners of who are currently receiving ART.10 test. If the screening result is positive, individuals living with HIV, or have The determination of the appropriate supplemental testing with an HIV-1/ had a new or more than 1 sex partner mode of delivery and the decision not HIV-2 antibody differentiation Downloaded from www.aappublications.org/news by guest on December 30, 2020 2 FROM THE AMERICAN ACADEMY OF PEDIATRICS
immunoassay and HIV RNA testing or raltegravir (RAL) to construct antiretroviral prophylaxis regimens should be performed urgently, a presumptive HIV therapy regimen for different clinical scenarios and and intravenous ZDV should be (see tables in ref 15).15 This 3-drug provide specific neonatal initiated pending the result of the combination antiretroviral drug antiretroviral dosing supplemental test.12 Prompt regimen is recommended for infants recommendations. initiation of intravenous ZDV, born to mothers who (1) received The administration of ZDV (possibly followed by infant antiretroviral prenatal antiretroviral drugs but had with other antiretroviral agents) to prophylaxis, may decrease the risk of suboptimal viral suppression at the infant should be initiated as soon perinatal transmission of HIV in these delivery, (2) received only as possible after birth and certainly settings.14 Cesarean delivery before intrapartum antiretroviral drugs, within 6 to 12 hours after delivery.27 rupture of membranes, if feasible, (3) received no antepartum or If the infant’s HIV exposure is first may also be considered, but there is intrapartum antiretroviral drugs, or recognized between 12 and 48 hours insufficient evidence to determine if (4) have known drug-resistant virus. after delivery, presumptive HIV cesarean delivery during labor Decisions about using a combination therapy should be initiated in that reduces perinatal transmission.13 If antiretroviral regimen over ZDV time period.15 Data from animal the supplemental results are negative, monotherapy can be made after studies indicate that the longer the maternal and infant antiretroviral balancing the benefits of enhanced delay in institution of prophylaxis, the prophylaxis should be stopped. prevention of perinatal transmission less likely that infection will be of HIV infection over possible toxicity Antiretroviral Management for the prevented. In most animal studies, from multiple drugs. The most Infant Exposed to HIV antiretroviral prophylaxis initiated 24 information about the use of to 36 hours after exposure is not as Postnatal antiretroviral drugs should antiretroviral combinations in effective for preventing infection.28–30 be provided to all infants exposed to neonates is available for older HIV to reduce the risk of perinatal regimens such as ZDV in combination The full course of drug supply needed HIV transmission. Antiretroviral with either single-dose for the entire 4 to 6 weeks should be prophylaxis is defined as the nevirapine16–19 or 3 doses of supplied to the infant before administration of 1 or more nevirapine in the first week of life20 discharge from the hospital antiretroviral drug(s) to a newborn or the dual combination of ZDV and irrespective of availability of out-of- infant without confirmed HIV lamivudine.21–24 pocket payment or insurance infection to reduce the risk of HIV coverage because pediatric acquisition, whereas presumptive HIV When making decisions to use antiretroviral formulations are not therapy consists of the administration combination antiretroviral drugs, widely available in commercial of a 3-drug combination antiretroviral consultation with a pediatrician pharmacies.15 regimen to newborn infants at experienced in the care of children highest risk of HIV acquisition. with HIV infection or the National Avoidance of Postnatal HIV Infection Presumptive HIV therapy is intended Clinician Consultation Center Postnatal transmission of HIV to be preliminary treatment of (https://nccc.ucsf.edu/clinician- through ingestion of human milk a newborn infant who is later consultation/perinatal-hiv-aids/) is from a mother with HIV infection is confirmed to have HIV infection but beneficial. Monitoring for hematologic well documented, and prolonged also serves as prophylaxis against toxicity is necessary for any breastfeeding from untreated perinatal transmission. Prophylaxis combination of ZDV and lamivudine mothers has resulted in rates as high has historically been achieved by compared to ZDV alone. Long-lasting as 9% to 15%.31 However, studies in giving a 6-week neonatal ZDV resistance is possible if the infant is low-resource countries have revealed chemoprophylaxis regimen. However, already infected when prophylaxis is that maternal and/or infant term infants born to women who given; this was most evident when antiretroviral drug administration received ART during pregnancy with nevirapine was used as a single agent during lactation reduces the risk of documented viral suppression can be for prophylaxis.25 The HHS Panel on HIV transmission to the infant via given a 4-week course.15 In higher- Treatment of Pregnant Women with human milk.32,33 Because the risk of risk cases, experts on the Perinatal HIV Infection and Prevention of infant mortality from infectious Guidelines Panel recommend Perinatal Transmission15 and Panel diseases and malnutrition is low in combining a 6-week infant ZDV on Antiretroviral Therapy and the United States and effective prophylaxis regimen with 2 Medical Management of Children alternative sources of feeding are additional antiretroviral drugs Living with HIV26 each publish an readily available, women with HIV including lamivudine (also known as extensive discussion of infection, including those receiving “3TC”) and either nevirapine (NVP) considerations for infant ART, should be counseled not to Downloaded from www.aappublications.org/news by guest on December 30, 2020 PEDIATRICS Volume 146, number 5, November 2020 3
breastfeed their infants or donate Supplemental Nutrition Program for Passively transferred maternal HIV their milk.34 Although maternal ART Women, Infants, and Children, are antibodies may be detectable in an has been shown to reduce the helpful in many cases. Evaluation of exposed but uninfected infant’s concentration of cell-free HIV in infant feeding practices with bloodstream until approximately human milk, it does not affect the suggestions for safer feeding options 18 months of age. Therefore, routine amount of cell-associated virus in and advice against premastication serological testing of infants exposed human milk.35 In addition, (the practice of prechewing solid food to HIV and children before the age of discordance between the viral load in before feeding it to another), which is 18 months is generally only plasma and human milk has been a potential risk factor for HIV informative if the test result is observed. There is also differential transmission, are indicated.38 negative. penetration of antiretroviral drugs into human milk, with some Polymerase chain reaction (PCR) Framework for the Total Elimination of antiretroviral drugs having assays that directly detect HIV DNA Perinatal Transmission of HIV concentrations in human milk that or RNA (generically referred to as HIV Several strategies have been nucleic acid amplification tests are higher than in maternal plasma, documented that could potentially and others have lower or [NAATs]) represent the gold standard lead to the elimination of perinatal for diagnostic testing of infants and undetectable human milk transmission of HIV. Early detection concentrations.36 These factors raise young children younger than 18 of HIV infection in the mother and months. With such testing, the concerns about infant drug toxicity evaluation and management of and the potential for selection of diagnosis or the presumptive infants exposed to HIV remain the key exclusion of HIV infection can be drug-resistant virus within human to preventing perinatal transmission. milk. Therefore, in the United States, established within the first several This involves coordination of clinical weeks of life among nonbreastfed where safe alternatives to care and social services, long-term breastfeeding are available, all infants. Although neonatal follow-up of infants exposed to HIV, antiretroviral drugs may decrease the women with HIV infection should and ongoing HIV surveillance.39 In avoid breastfeeding.37 concentration of HIV RNA in infant many cases, early detection is not plasma in the first 6 weeks of life,42 achieved because of social issues such HIV DNA PCR results generally Cultural differences require that as lack of access to mental, remain positive in most individuals counseling the mother about the preventive, and general health care or taking ART who have undetectable avoidance of breastfeeding should be substance use.40,41 Interventions plasma HIV RNA. The sensitivity of conducted in a sensitive manner. For targeted to at-risk populations can both DNA and RNA PCR testing is some women, not being able to minimize missed opportunities for high,43,44 so either can be used for the breastfeed may be the hardest the prevention of perinatal diagnosis of HIV infection in component of their effort to protect transmission of HIV. To be most infancy.45 False-positive results with their newborn infant from acquiring effective, these efforts should be low-level viral copy numbers have HIV infection.37 Other mothers, sustained and involve integrated been described when using HIV RNA particularly those who have clinical management and social assays,42,46,47 reinforcing the emigrated from parts of the world services.39 importance of repeating any positive where breastfeeding is nearly universal, may feel that formula assay result to confirm the diagnosis feeding their infant discloses their of HIV infection in infancy. False- CARE OF THE INFANT EXPOSED TO HIV own HIV infection to family or negative results occur rarely, and friends. As a result, recommendations Testing to Determine the Infant’s HIV retesting could be considered to prevent perinatal transmission Infection Status (perhaps by using a different test) if may not always be followed. Open, Identification of the infant born to clinical findings suggest the presence nonjudgmental communication about a mother with HIV infection and early of HIV infection. feeding practices facilitates determination of the presence or appropriate follow-up and testing of absence of HIV infection in the infant Detection of Non–Subtype B HIV and all infants, including those whose are critical to allow early initiation of HIV-2 mothers choose to breastfeed after prophylaxis or presumptive HIV For infants born to women known or appropriate counseling.34 Education therapy and provision of needed care. suspected to have infection with non- covering appropriate formula feeding Appropriate HIV diagnostic testing B subtypes of HIV, use of HIV RNA and the cost of formula can be for infants and children younger than assays may be preferable to the use of provided to women. Referrals, 18 months differs from that for older HIV DNA assays for diagnostic testing. including enrollment in the Special children, adolescents, and adults. Women who acquire HIV infection in Downloaded from www.aappublications.org/news by guest on December 30, 2020 4 FROM THE AMERICAN ACADEMY OF PEDIATRICS
North America are most commonly additional virological diagnostic first week of life and a subsequent infected with HIV subtype B.48 testing at birth as well as 2 to 4 weeks positive test result are considered Women who acquire HIV outside of after cessation of antiretroviral to have intrapartum infection.55 North America are often infected with prophylaxis should be considered.12 Cord blood specimens are not other HIV subtypes. Subtypes C and D used for HIV RNA or DNA testing predominate in southern and eastern An HIV NAAT should be performed at because they are associated with Africa, subtype C predominates on birth or in the first few days of life for an unacceptably high rate of false- the Indian subcontinent, and subtype infants at highest risk of infection, positive test results. E predominates in much of Southeast including those whose mothers Asia.48 HIV DNA PCR assays may be received no antiretroviral drugs When a mother’s HIV status is less sensitive in the detection of non- during pregnancy, when maternal unknown at delivery or after birth, B subtype HIV, and false-negative HIV prophylaxis was started late in expedited HIV testing (preferably DNA PCR assay results have been pregnancy or during labor, or if the a combined test for HIV antigen and reported in infants infected with non- mother had primary HIV infection antibody) for mother and/or infant B subtype HIV.49,50 Some of the during pregnancy. In the absence of should be performed. In the event of currently available HIV RNA assays maternal ART, as many as 30% to a positive initial test result, have improved sensitivity for 40% of infants with HIV infection can presumptive HIV therapy is initiated detection of non-B subtype HIV be identified by 48 hours of age.53,54 in the infant as soon as possible infection, although even these assays Infants with a positive NAAT result at pending the result of a supplemental may not detect all non-B subtypes, or before 48 hours of age are test.15 Treatment should be stopped if such as the uncommon group O HIV considered to have in utero infection results of supplemental testing with strain. When testing infants with HIV, whereas infants who have HIV antibody and a NAAT are suspected of infection with non-B a negative NAAT result during the negative. subtype HIV, consultation with a pediatrician experienced in the care TABLE 1 Evaluation and Treatment of the Infant Exposed to HIV-1 (Birth to 18 Months of Age), in of infants and children with HIV Addition to Routine Pediatric Care and Immunizations infection is recommended. a Action Infant Age HIV-2 is a retrovirus similar to HIV Birth 14 d 4 wk 6 wk 8 wk 4 mo 12–18 and is found most commonly in mo western Africa. It is less virulent, with Antiretroviral prophylaxis or presumptive HIV X X X X — — — a slower rate of progression of clinical therapyb disease and lower rates of perinatal Recommend against breastfeeding and X X X X X X X premastication transmission.51 However, NAATs for Hemoglobin or complete blood cell count X — Xc — Xc — — HIV will not identify HIV-2, so if HIV-1 DNA or RNA PCR assayd e Xf X — g X — infection with HIV-2 is suspected, Initiate PCP prophylaxish — — — X — — — consultation with the CDC via the Antibody to HIV-1i — — — — — — X state department of health may be X, indication to conduct the specified action; —, not applicable. sought to help arrange specific HIV-2 a See the text for detailed discussion of each action. If during this period, HIV infection is diagnosed in the infant, laboratory monitoring and immunizations should follow guidelines for treatment of pediatric HIV infection.52 testing. b Antiretroviral prophylaxis or presumptive HIV therapy, depending on the infant’s risk of acquiring HIV (see text) is initiated as soon as possible after birth but certainly within 6–12 hours. ZDV prophylaxis is continued for 4–6 weeks, at which time it is stopped. Timing of Diagnostic Testing in c Checked at 4 weeks by some experts and rechecked at 8 weeks if the week 4 hemoglobin level was significantly low. Infants With Known Perinatal d All infants exposed to HIV-1 should undergo virological testing for HIV-1 with HIV-1 DNA or RNA PCR assays at 14 to Exposure to HIV 21 days of age and, if results are negative, they should be repeated at 1 to 2 and 4 to 6 months of age to identify or exclude HIV-1 infection as early as possible. Any positive test result at any age is promptly repeated to confirm the For infants with known perinatal diagnosis of HIV-1 infection. exposure, it is recommended that e HIV-1 DNA or RNA PCR assay testing in the first few days of life allows identification of in utero infection and should be diagnostic testing with HIV DNA or considered if maternal antiretroviral agents were not administered during pregnancy or in other high-risk situations. A negative test result at this age requires repeat testing to exclude HIV-1 infection. RNA assays be performed at 14 to f A negative test result at this age requires repeat testing to exclude HIV-1 infection. Presumptive uninfected indicates 21 days of age, and if results are a negative NAAT result at $14 days and $4 weeks (1 month) of age; definitive uninfected indicates a negative NAAT result negative, they should be repeated at 1 at $1 and $4 months of age (see text for complete details). g For higher-risk infants, additional virological diagnostic testing should be considered 2 to 4 weeks after cessation of to 2 months of age and again at 4 to antiretroviral prophylaxis (ie, at 8–10 weeks of life). 6 months of age (Table 1).52 For h Infants with indeterminate HIV-1 infection status should receive prophylaxis starting at 4–6 weeks of age until they are infants at a higher risk of perinatal deemed to be presumptively or definitively uninfected with HIV-1. Prophylaxis is not recommended for infants who meet criteria for presumptive or definitive lack of HIV-1 infection; therefore, a NAAT at 2 and 4–6 weeks of age allows for HIV transmission who receive avoidance of PCP prophylaxis if both results are negative. multiple antiretroviral drugs, i Many experts confirm the absence of HIV-1 infection with a negative HIV-1 antibody assay result at 12–18 months of age. Downloaded from www.aappublications.org/news by guest on December 30, 2020 PEDIATRICS Volume 146, number 5, November 2020 5
If an HIV NAAT for the newborn use in infants who do not meet the weeks, 3 months, and 6 months after infant was not performed shortly criteria for HIV infection noted breastfeeding cessation.52 after birth, or if such test results were above.52 negative, diagnostic testing with an Role of HIV Antibody Testing in In nonbreastfeeding infants younger Infants Exposed to HIV HIV NAAT is performed at 14 to than 18 months with no positive HIV 21 days of age because the diagnostic In infants exposed to HIV who are not NAAT results, presumptive exclusion sensitivity of virological assays infected with HIV, maternal HIV of HIV infection is based on the increases rapidly by 2 weeks of age.53 antibodies transferred in utero may following: This change in assay sensitivity persist through 18 months of age. reflects the biology of perinatal • two negative HIV RNA or DNA Loss of HIV antibody in an infant with transmission, such that when HIV is NAAT results, from separate previously negative HIV NAAT results acquired at the time of delivery, it specimens, both of which were (seroreversion) definitively confirms may take up to 2 weeks for a NAAT to obtained at $2 weeks of age and 1 that the infant is not infected with be able to detect the virus.55 of which was obtained at $4 weeks HIV. Many infants exposed to HIV Therefore, negative results of HIV of age; or serorevert to HIV antibody negativity DNA PCR or RNA tests performed • one negative HIV RNA or DNA by 12 months of age.57 Many experts before 14 days of age are less helpful NAAT result from a specimen confirm the absence of HIV infection in excluding HIV infection acquired at obtained at $8 weeks of age; or with a negative HIV antibody assay the time of birth than are results of • one negative HIV antibody test result at 12 to 18 months of age. If an tests performed at or after 14 days result obtained at $6 months infant exposed to HIV who is not of age. of age. known to be infected is tested at 12 months of age and is still antibody- Management if an HIV Virological Definitive exclusion of HIV infection positive, then testing should be Test Result Is Positive in a nonbreastfed infant is based on repeated at 18 to 24 months of age. If any of the HIV NAAT results are the following: Performing the first antibody test at positive, an immediate repeat HIV • two or more negative HIV RNA or 18 months of age to confirm NAAT is recommended to confirm the DNA NAAT results, with 1 negative seroreversion may avoid the cost and diagnosis of HIV infection. A diagnosis result at age $1 month and 1 pain of performing 2 tests. Positive of HIV infection can be made on the negative result at age $4 months; HIV antibodies at 24 months of age or basis of 2 separate blood samples, or older may indicate HIV infection and each of which is positive for HIV DNA • two negative HIV antibody test should be confirmed with an HIV or RNA. If infection is confirmed, results from separate specimens virological test.26 A confirmed NAAT a pediatric HIV specialist should be obtained at age $6 months. result at or beyond 24 months of age consulted for advice regarding ART in an infant with infection previously In the unusual case of an infant with and care. HIV disease can progress excluded as outlined above suggests a positive HIV NAAT result followed rapidly in infants with HIV infection, that the infant was infected after by a negative NAAT result, an expert and neither CD41 T-lymphocyte infancy, such as through in the care of children with HIV count nor HIV RNA copy number is breastfeeding, premastication of solid infection can be consulted for further a reliable predictor of the risk of food by a caregiver with HIV testing recommendations. disease progression in infants.53 infection,34 or sexual abuse. Many experts confirm the absence of Interpretation of Negative HIV Test HIV infection with a negative HIV Prevention of Pneumocystis jirovecii Results antibody assay result at 12 to Pneumonia On the basis of analysis of HIV DNA or 18 months of age (see next section). The most common severe RNA assay results from multiple For both presumptive and definitive opportunistic infection in infants and studies, the CDC has revised the case exclusion of infection, the child children with HIV infection is definition for exclusion of HIV should have no other laboratory (eg, Pneumocystis jirovecii pneumonia infection in infants for surveillance no positive NAAT results) or clinical (PCP). PCP incidence in untreated purposes.56 The definitions supplied (eg, no AIDS-defining conditions) infants with HIV is highest during the here are based on the CDC evidence of HIV infection. For infants first year of life, with cases peaking at surveillance definitions and are who have been breastfed, a similar 3 to 6 months of age.58,59 appropriate for the management of testing algorithm can be followed, Chemoprophylaxis is highly effective children born to women with HIV with additional testing every in the prevention of PCP and should infection. These definitions of 3 months during breastfeeding be administered to infants in whom exclusion of HIV infection are only for followed by monitoring at 4 to 6 HIV infection is diagnosed from 4 to Downloaded from www.aappublications.org/news by guest on December 30, 2020 6 FROM THE AMERICAN ACADEMY OF PEDIATRICS
6 weeks of age until their first any other person in the family The 6-week ZDV regimen in infants birthday. Thereafter, the need for receives a diagnosis of acid-fast can cause anemia, which largely prophylaxis is based on age-specific bacillus smear-positive TB, the infant remains clinically insignificant and CD41 T-lymphocyte counts and/or should be separated from that person generally resolves after termination percentages.60 Trimethoprim- until the TB infection has been of ZDV prophylaxis. If anemia persists sulfamethoxazole is the most treated with anti-TB medications and even after stopping the ZDV regimen, common drug used for prophylaxis a physician has determined that the alternative etiologies are likely because of its high efficacy, relative person is no longer contagious. In the responsible. Anemia can be severe in safety, low cost, and broad event that a pregnant woman has infants taking ZDV who were born antimicrobial spectrum60 (for documented TB that can be spread by prematurely or with other medical further discussion, see ref 60). the hematogenous route, the infant problems. Also, administration of ZDV should be evaluated for congenital TB in combination with other PCP prophylaxis is not recommended by a pediatric infectious disease antiretroviral drugs can cause for infants with presumptive lack of expert. hematologic toxicity.68 The timing of HIV infection (see previous section) monitoring of hematologic toxicity but should be initiated for infants Immunizations from ZDV prophylaxis depends on with indeterminate HIV infection Each year, the CDC publishes many factors such as baseline status starting at 4 to 6 weeks of immunization schedules for children hematologic values, gestational age at age.60 Thus, for infants with negative and adolescents 0 to 18 years of age62 birth, clinical condition of the child, HIV NAAT results at 2 and 4 to as well as for children with HIV receipt of concomitant medications, 6 weeks of age (presumptively not infection.63 All routine infant and maternal antepartum therapy. infected with HIV), PCP prophylaxis immunizations should be given to Hemoglobin and neutrophil counts can be avoided completely. For an infants exposed to HIV. If HIV should be measured in infants who infant exposed to HIV with infection is confirmed in an infant have taken ZDV- and/or lamivudine- indeterminate HIV infection status exposed to HIV, then guidelines for containing antiretroviral regimens for who initiated prophylaxis at 4 to the child with HIV infection should be 4 or more weeks. 6 weeks of age and subsequently followed.62,63 meets criteria for presumptive or The decision of whether to definitive lack of HIV infection, PCP Monitoring for Toxicity From In Utero discontinue antiretroviral prophylaxis prophylaxis can be stopped. and Neonatal Antiretroviral Drug early because of identification of Exposure hematologic abnormalities is made on Prevention of Tuberculosis the basis of factors such as severity of Monitoring for and Management of Increased risk of tuberculosis (TB) Short-term Toxicity During Infant the laboratory abnormality, among adults living with HIV Antiretroviral Prophylaxis associated clinical symptoms, infection is well documented. Because duration of infant prophylaxis already Because exposure to maternal infants and children with TB infection received, the magnitude of the risk of antiretroviral drugs taken during and disease are usually infected by an HIV infection in the infant (as pregnancy can cause small but adult with whom they live and have assessed by maternal receipt of ART, apparent variations of hemoglobin daily contact, TB infection status maternal viral load near delivery, and and neutrophil counts, a baseline information should be obtained about mode of delivery), and availability of complete blood cell and differential the mother and all other household alternative interventions (eg, red count has been recommended for the contacts of infants born to mothers blood cell transfusion) in consultation newborn infant.64 The risk of anemia with HIV. Bacille Calmette-Guerin with a pediatric HIV specialist. and neutropenia is greater in infants immunization is not recommended whose mothers received ART during Routine measurement of serum for infants born to women with HIV pregnancy, but mild anemia was also lactate concentration in infection in the United States and observed commonly in infants whose asymptomatic neonates to screen for should not be administered to infants mothers received ZDV monotherapy possible mitochondrial toxicity and children with known HIV compared with infants whose related to ZDV prophylaxis is not infection because of its potential to mothers received no antiretroviral recommended because the clinical cause disseminated disease.61 drugs during pregnancy.65 relevance of increased lactate If an infant is exposed to anyone with Nonetheless, the advantages of concentrations in the absence of active TB, the infant should be maternal ART for prevention of symptoms is unknown, transient evaluated for TB disease and perinatal transmission are far greater elevations return to normal, and managed according to published than hematologic toxicity in the there is poor predictive value for later guidelines.61 If the infant’s mother or newborn infant.66,67 appearance of symptomatic Downloaded from www.aappublications.org/news by guest on December 30, 2020 PEDIATRICS Volume 146, number 5, November 2020 7
toxicity.69,70 However, if severe the siblings, should be tested because include adherence to medications to clinical symptoms, particularly it is possible, albeit unusual, for prevent perinatal transmission of HIV neurologic symptoms, develop in the perinatally infected children to and prompt assessment of illness in infant, a serum lactate concentration remain asymptomatic into the infant exposed to HIV as well as should be obtained. If the serum adolescence.80,81 the schedule of follow-up visits for lactate concentration is significantly assessment and laboratory assays elevated in an infant with compatible Counseling and Support (both for diagnosis of HIV infection clinical symptoms, a pediatric HIV An HIV diagnosis can have and to check for any adverse effects expert can help determine if a significant impact on an individual of antiretroviral exposure). antiretroviral prophylaxis should be and his or her family. When Breastfeeding is not recommended terminated. In general, prophylaxis counseling the mother of an infant even if mothers are receiving ART for should continue unless there is exposed to HIV, exploring whether their own HIV disease.37 a compelling reason to stop. HIV infection was recently diagnosed Counseling should include education in the mother during or after about the risks of HIV transmission, Long-term Toxicity pregnancy and whether she needs including the lack of transmission risk Research has not revealed significant a referral for her own care may in family activities such as eating, risk of neoplasia or organ-system contribute to care of the whole family. bathing, or sleeping together. toxicities from in utero exposure to Additionally, some families may Planning regarding future ZDV or other antiretroviral drugs.71 require support related to an HIV- reproductive plans for the family, The issue of mitochondrial associated illness or death in other likely in collaboration with the dysfunction from the use of ART has family members. family’s adult HIV and gynecologic been unsubstantiated69 but remains Increased need for social and and obstetric providers, can minimize under investigation. However, in psychological support services may the risk of HIV acquisition for sexual children exposed to HIV with severe result from factors including partners and perinatal transmission clinical symptoms, neurologic or economic hardship, substance use, in future pregnancies. cardiac in particular, mitochondrial dysfunction is part of the differential depression, social isolation, lack of Confidentiality should be maintained diagnosis in HIV infection.70,72–77 health care, unemployment, difficulty at all times. In some cases, one or in finding housing, or domestic Information regarding in utero and/ more family members may not be violence. In addition, fear of loss of or neonatal antiretroviral exposure is aware of the HIV infection status of existing supports and services, such an important part of a permanent the mother, which warrants extra as loss of support from a partner or record, particularly in uninfected caution in the labor and delivery unit loss of employment, insurance, or children. Uninfected children and when discussing the postpartum health care coverage are important management of the infant or in the perinatally exposed to HIV have been considerations.82–84 Particularly found to have a higher rate of pediatric office when discussing care vulnerable are pregnant adolescents childhood infections in the first year of the child. with HIV infection.85 of life than unexposed children and benefit from regular medical care.78,79 Additional factors may be present for HIV Exposure and Infection Status Yearly follow-up into adulthood to women who have emigrated from Reporting monitor for long-term toxicity such other countries, in particular factors Name-based HIV reporting to state as cancer or neurodevelopmental related to culture and concerns about health departments is required in all or metabolic disorders is immigration status. This population states and territories for surveillance appropriate.71 may have been subject to or know of purposes.86 In addition, many states stigmatization and discrimination require reporting pregnancy in Testing Family Members against people with HIV infection. In women living with HIV and the addition, distrust or HIV screening should be infection status of their infants. To misunderstanding of the US medical recommended and offered to all facilitate the required reporting, even system may complicate care and immediate family members with when reporting is delegated to follow-up of the infant. unknown HIV infection status; this another party, the pediatrician should should be performed with the An outline of plans for medical care collect the maternal antiretroviral mother’s consent to include the for the infant will help new parents, treatment history, maternal infant’s father and/or mother’s sexual foster parents, or other caregivers demographics, labor and delivery partners. All siblings of the infant optimally care for their infant record, and newborn records at the exposed to HIV, regardless of age of exposed to HIV. Important topics time of birth. Downloaded from www.aappublications.org/news by guest on December 30, 2020 8 FROM THE AMERICAN ACADEMY OF PEDIATRICS
SUMMARY (SEE TABLE 1) should be stopped and with no positive HIV virological 1. Whenever possible, maternal HIV breastfeeding can be initiated. test results, presumptive infection should be identified 4. Avoidance of breastfeeding has exclusion of HIV infection is before or during pregnancy, been and continues to be based on 2 negative HIV RNA or which allows earlier initiation of a standard, strong DNA NAAT results from separate care for the woman and for more recommendation for women specimens, both of which were effective interventions to prevent living with HIV in the United obtained at $2 weeks of age perinatal transmission. The AAP States because maternal ART and 1 of which was obtained recommends documented, dramatically reduces but at $4 weeks of age, 1 negative routine HIV testing for all does not eliminate breast HIV RNA or DNA NAAT result pregnant women in the United milk transmission, and safe obtained at $8 weeks of age, States after notifying the patient infant feeding alternatives are or 1 negative HIV antibody test that testing will be performed, result obtained at $6 months readily available in the United unless the patient declines HIV of age. States. testing (opt-out consent or right 9. Definitive exclusion of HIV 5. Pediatricians should provide of refusal). All HIV testing, infection in a nonbreastfed infant counseling to parents and including during the third is based on 2 or more negative caregivers of infants exposed to trimester, should be performed in HIV RNA or DNA test results, HIV about HIV infection, a manner consistent with state with 1 negative result at age including routine care of the and local laws. $1 month and 1 negative result infant, diagnostic tests, and at age $4 months, or 2 negative 2. If the mother’s HIV serostatus is potential drug toxicities. HIV antibody test results from unknown at the time of labor or 6. All infants exposed to HIV should separate specimens obtained at birth, the newborn infant’s health undergo virological testing with age $6 months. care provider should perform HIV DNA, RNA, or total nucleic expedited HIV antibody testing 10. Many experts confirm the acid assays at 14 to 21 days of on the mother or the newborn absence of HIV infection with age. If results are negative, these infant or antigen/antibody a negative HIV antibody assay tests should be repeated at 1 to 2 testing on the mother, with result at 12 to 24 months of and 4 to 6 months of age to age. These laboratory tests can appropriate consent consistent identify or exclude HIV infection only be used to exclude HIV with state and local laws. The as early as possible. If any test infection if there is no other results should be reported to result is positive, the test should laboratory or clinical evidence of health care providers quickly be repeated immediately for HIV infection (ie, no subsequent enough to allow effective confirmation. positive results from NAATs antiretroviral prophylaxis to be administered to the infant as 7. Initial testing in the first few days if tests were performed and soon as possible after birth and of life allows identification of in no AIDS-defining condition certainly within 6 to 12 hours utero infection and should be for which there is no other after birth. considered if maternal underlying condition of antiretroviral drugs were not immunosuppression) and the 3. Intravenous ZDV for the mother administered during pregnancy child is not receiving and presumptive HIV therapy for or in other high-risk situations antiretroviral drugs. the newborn infant should be (see text). If an HIV NAAT for 11. PCP prophylaxis is not administered promptly on the basis of a positive rapid antibody the newborn infant was not recommended for infants who or antigen/antibody test result performed shortly after birth, are presumptively or definitively without waiting for the results of or if such test results were not infected with HIV (see supplemental HIV testing, and negative, diagnostic testing recommendations 9 and 10). breastfeeding should not be with an HIV NAAT is performed Infants with indeterminate initiated. If the rapid test result is at 14 to 21 days of age HIV infection status after 6 weeks positive, supplemental testing because the diagnostic of age should receive prophylaxis should be performed, and if sensitivity of virological assays until they are determined supplemental test results are increases rapidly by 2 weeks presumptively or definitively negative (indicating that the of age. not to be infected with HIV. infant was not truly exposed to 8. For nonbreastfeeding infants and 12. All infants exposed to HIV), then antiretroviral drugs children younger than 18 months antiretroviral agents in utero or Downloaded from www.aappublications.org/news by guest on December 30, 2020 PEDIATRICS Volume 146, number 5, November 2020 9
as newborn infants should be LEAD AUTHORS George Siberry, MD, MPH, FAAP – United monitored for short- and long- States Agency for International Development Ellen Gould Chadwick, MD, FAAP (USAID) term drug toxicity. Echezona Edozie Ezeanolue, MD, MPH, FAAP Bill G. Kapogiannis, MD – Eunice Kennedy 13. Immunizations and TB screening Shriver National Institute for Child Health and should be provided for infants Human Development COMMITTEE ON PEDIATRIC AIDS, exposed to HIV in accordance 2018–2019 with published guidelines. A Ellen Gould Chadwick, MD, FAAP, STAFF BCG vaccine should not be Chairperson administered to infants in whom Anjie Emanuel, MPH Echezona Edozie Ezeanolue, MD, MPH, FAAP HIV infection is diagnosed. Katherine Kai-Chi Hsu, MD, MPH, FAAP Athena P. Kourtis, MD, PhD, MPH, FAAP 14. HIV testing should be offered and Ayesha Mirza, MD, FAAP recommended to immediate Rosemary M. Olivero, MD, FAAP family members of infants Natella Yurievna Rakhmanina, MD, ABBREVIATIONS exposed to HIV. PhD, FAAP Carina Rodriguez, MD, FAAP AAP: American Academy of 15. The practitioner providing care Pediatrics for an infant with HIV infection ART: antiretroviral therapy should consult with a pediatric PREVIOUS COMMITTEE ON PEDIATRIC AIDS CDC: Centers for Disease Control HIV specialist. An alternative MEMBER and Prevention service for advice on prevention Elizabeth Montgomery Collins, MD, HHS: US Department of Health and of perinatal HIV transmission or MPH, FAAP Human Services HIV management is the National NAAT: nucleic acid Clinician Consultation Center CONSULTANT amplification test (https://nccc.ucsf.edu/clinician- PCP: Pneumocystis jirovecii Athena P. Kourtis, MD, PhD, MPH, FAAP consultation/perinatal-hiv-aids/). pneumonia If the infant’s mother is an PCR: polymerase chain reaction adolescent, consultation with LIAISONS TB: tuberculosis a practitioner familiar with the Steve Nesheim, MD – Centers for Disease ZDV: zidovudine care of adolescents is advised. Control and Prevention FINANCIAL DISCLOSURE: Dr Chadwick disclosed a financial relationship in which her spouse owns stock in pharmaceutical companies that manufacture drugs used to treat HIV/AIDS; and Dr Ezeanolue has indicated he has no financial relationships relevant to this article to disclose. FUNDING: No external funding. POTENTIAL CONFLICT OF INTEREST: Dr Chadwick disclosed a financial relationship in which her spouse owns stock in pharmaceutical companies that manufacture drugs used to treat HIV/AIDS; and Dr Ezeanolue has indicated he has no potential conflicts of interest to disclose. REFERENCES 1. Nesheim SR, Wiener J, Fitz Harris LF, transmission in the United States. AIDS. 6. Mofensen LM; Centers for Disease Lampe MA, Weidle PJ. Brief report: 2015;29(12):1511–1515 Control and Prevention, U.S. Public estimated incidence of perinatally Health Service Task Force. U.S. Public 4. American Academy of Pediatrics acquired HIV infection in the Health Service Task Force Committee on Pediatric AIDS. HIV United States, 1978-2013. J Acquir recommendations for use of testing and prophylaxis to prevent Immune Defic Syndr. 2017;76(5): antiretroviral drugs in pregnant HIV-1- mother-to-child transmission in the 461–464 infected women for maternal health United States. Pediatrics. 2008;122(5): 2. Bert F, Gualano MR, Biancone P, et al. 1127–1134 and interventions to reduce perinatal HIV screening in pregnant women: HIV-1 transmission in the United States. 5. Havens PL, Mofenson LM; American MMWR Recomm Rep. 2002;51(RR): a systematic review of cost- Academy of Pediatrics Committee on 1–38–4 effectiveness studies. Int J Health Plann Pediatric AIDS. Evaluation and Manage. 2018;33(1):31–50 7. Committee on Obstetric Practice; HIV management of the infant exposed to 3. Camacho-Gonzalez AF, Kingbo M-H, HIV-1 in the United States. [published Expert Work Group. ACOG Committee Boylan A, Eckard AR, Chahroudi A, correction appears in Pediatrics. 2012; Opinion No. 752: prenatal and perinatal Chakraborty R. Missed opportunities 130(6):1183–1184]. Pediatrics. 2009; human immunodeficiency virus testing. for prevention of mother-to-child 123(1):175–187 Obstet Gynecol. 2018;132(3):e138–e142 Downloaded from www.aappublications.org/news by guest on December 30, 2020 10 FROM THE AMERICAN ACADEMY OF PEDIATRICS
8. Panel on Treatment of Pregnant Women Available at: https://clinicalinfo.hiv.gov/ Study Group. Lamivudine-zidovudine with HIV Infection and Prevention of en/guidelines/perinatal/transmission- combination for prevention of Perinatal Transmission. and-mode-delivery?view=full Accessed maternal-infant transmission of HIV-1. Recommendations for the Use of September 23, 2020 JAMA. 2001;285(16):2083–2093 Antiretroviral Drugs in Pregnant 14. Wade NA, Zielinski MA, Butsashvili M, 22. Moodley D, Moodley J, Coovadia H, et al.; Women with HIV Infection and et al. Decline in perinatal HIV South African Intrapartum Nevirapine Interventions to Reduce Perinatal HIV transmission in New York State (1997- Trial (SAINT) Investigators. A Transmission in the United States. 2000). J Acquir Immune Defic Syndr. multicenter randomized controlled trial Available at: https://clinicalinfo.hiv.gov/ 2004;36(5):1075–1082 of nevirapine versus a combination of en/guidelines/perinatal/maternal-hiv- 15. 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Mandelbrot L, Landreau-Mascaro A, virus-infected newborn macaques Interventions to Reduce Perinatal HIV Rekacewicz C, et al.; Agence Nationale against rapid onset of AIDS. Antimicrob Transmission in the United States. de Recherches sur le SIDA (ANRS) 075 Agents Chemother. 1995;39(1):125–131 Downloaded from www.aappublications.org/news by guest on December 30, 2020 PEDIATRICS Volume 146, number 5, November 2020 11
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