HIV antibody detection in children who started antiretroviral treatment in infancy Louise Kuhn, Diana Schramm, Stephanie Shiau, Renate Strehlau, Maria.

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Presentation transcript:

HIV antibody detection in children who started antiretroviral treatment in infancy Louise Kuhn, Diana Schramm, Stephanie Shiau, Renate Strehlau, Maria Paximadis, Francoise Pinillos, Karl Technau, Leigh Martens, Ashraf Coovadia, Elaine Abrams, Adrian Puren, Caroline Tiemessen Mailman School of Public Health, Columbia University National Institute for Communicable Diseases, & Empilweni Service and Research Unit, Rahima Moosa Mother and Child Hospital, Johannesburg, South Africa

Background HIV antibody tests usually are considered diagnostic Anecdotal reports of treated HIV-infected children having negative HIV antibody tests Can lead to confusion in the clinical setting Frequency in clinical populations is unknown

Objective To determine the frequency of negative HIV antibody test results in a well-defined clinical population of HIV-infected children suppressed on antiretroviral therapy (ART)

Methods 104 HIV-infected children Enrolled in trial in Johannesburg, South Africa Under 15 months when started ART Now 3 to 6 years old suppressed (<50 copies/ml) Tested with ELISA (Genescreen TM HIV1/2 version 2; Biorad) Started ART < 15mFollowed 3-5 years Tested HIV Ab

HIV antibody in 104 children started ART mean 8 months currently suppressed on ART for mean 5 years Mean age at ART start if neg/low 3.7 months (2.2 to 4.9)

Mean HIV antibody optical density (OD) by age at ART start N=43N=61 P=

Updated Methods Added additional 122 HIV-infected children Enrolled in trial in Johannesburg, South Africa Under 6 months when started ART Now 3 to 6 years old suppressed (<50 copies/ml) Tested with ELISA (Genescreen TM HIV1/2 version 2; Biorad) Started ART < 15mFollowed 3-5 years Tested HIV Ab

HIV antibody in 122 children started ART mean 3.9 months (range 3 wks to 6.9 m) currently suppressed on ART for mean 5 years 21%

HIV Antibody status in 226 children currently suppressed on ART by age at ART start

Conclusions ~30% HIV Ab neg if ART start <3 months of age ~5% HIV Ab neg if ART start 4-6 months of age Use of standard Ab tests in early treated children can lead to confusion Early ART may influence ontogeny of Ab response – consequences for viral reservoir needs further research Earlier ART may have several advantages necessitating earlier infant diagnosis than is currently routine

Acknowledgments Neverest Study Team National Institute for Communicable Diseases Eunice Kennedy Shriver, National Institute of Child Health and Human Development HD61255