Reduced detection and levels of protective antibodies to hepatitis B vaccine in under 2-year-old HIV positive South African children at a paediatric outpatient clinic.

Abstract:

:The study evaluated and compared the prevalence of anti-HBs and exposure to hepatitis B virus (HBV) in vaccinated South African babies aged between 5 and 24 months from the Expanded Programme on Immunisation clinic [EPI group] and paediatric outpatient clinic [OPD group], and results were stratified by HIV status. A total of 303 (243 EPI group and 60 OPD group) babies were studied. All sera were tested for anti-HBs, HBsAg and anti-HBc, while IgM anti-HBc and HBV DNA were only tested in samples positive for HBsAg and/or anti-HBc. Overall, there was a gross difference in the prevalence of anti-HBs marker between the EPI and OPD groups. The EPI group demonstrated higher levels of seroconversion (89.3% vs. 81.7%; p=0.105) and seroprotection rates (86.0% vs. 75.0%; p=0.038), compared to the OPD babies. When the overall results were stratified by HIV status, seroprotection was 85.7% for the HIV-negatives and 78.1% for the HIV-positives, although this was not statistically significant (p=0.125). The seroprotection rates were almost comparable between the HIV-positives (84.3%; n=51) and the HIV-negatives (86.5%; n=192) (p=0.695) in the EPI group. In contrast, reduced seroprotection rates were observed between the HIV-positives (63.6%; n=22) and HIV-negatives (81.6%; n=38) in the OPD group, although this was not statistically significant (p=0.123). Interestingly, no HBsAg or anti-HBc marker was detected in the OPD group, compared to total exposure rate of 4.9% (HBsAg carriage was 1.2%) in the EPI group.

journal_name

Vaccine

journal_title

Vaccine

authors

Simani OE,Leroux-Roels G,François G,Burnett RJ,Meheus A,Mphahlele MJ

doi

10.1016/j.vaccine.2008.10.004

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

146-51

issue

1

eissn

0264-410X

issn

1873-2518

pii

S0264-410X(08)01378-9

journal_volume

27

pub_type

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