Preventing HIV-1 transmission in breastfed infants in low resource settings: early HIV infection and late postnatal transmission in a routine prevention of mother-to-child transmission program in Yaounde, Cameroon.

OBJECTIVE: To report on overall HIV-transmission rates [early and late postnatal transmission (LPNT)] in breastfed infants born to HIV-positive women. METHODS: Mother-baby pairs in a routine prevention of mother-to-child transmission program. Promotion of exclusive breastfeeding (EBF) coupled with access to antiretroviral treatment (ART) or prevention using antiretroviral (pARV). Early infant diagnosis using HIV-RNA/PCR or HIV-DNA/PCR >6 weeks. LPNT assessed 6 weeks after weaning in infant earlier tested negative. MAIN MEASUREMENT: early HIV infection and LPNT. RESULTS: We included 285 infants for analysis; 89.5 % of mothers were receiving ART or pARV; 86% babies took daily pARV (median duration, 6 weeks). Exclusive breastfeeding (EBF) rate: 96% (median duration, 4 months). The cumulative transmission of HIV-1 was 2.8% at 8 weeks (95% confidence interval: 1.9-3.7). After weaning (abrupt 44%), 3 of 212 infants were HIV infected (1.4%). Nine-month cumulative HIV-transmission rate was 4.2% (1.5-6.9). Incidence of late postnatal HIV infection stood at 1.5/100 child-years of breastfeeding (BF). Cumulative risk of HIV transmission (8 weeks-9 months) was 1%. CONCLUSION: Both promotion of EBF and access to antiretroviral therapy contribute to lower HIV transmission in breastfed infants in low resource settings.

Early outcomes of HIV exposed children in the first district-wide programme using extended regimens for the prevention of mother-to-child transmission of HIV, in Yaounde, Cameroon.

OBJECTIVE: Report on the early outcomes achieved in the prevention of mother-to-child transmission (PMTCT) programme in the Djoungolo Health District using more effective antiretroviral PMTCT regimens. METHODS: Observational cohort of HIV exposed infants. MAIN OUTCOME MEASURE: early infant HIV status and 3-month mortality rate. RESULTS: From March 2008 to March 2010, 587 HIV-positive mother-baby pairs were enrolled and classified according to the following maternal antiretroviral regimen: Group 1: highly active antiretroviral therapy (HAART), Group 2: dual therapy, Group 3: no treatment. 484/587 (82%) underwent HIV-early infant diagnosis at a median age of 7 weeks; 4.5% (95% CI 2.65-6.34) were HIV-infected. HIV transmission rate differed by maternal prophylaxis: 1.7% for HAART, 2.7% for dual therapy and 15.7% for Group 3 (p < 0.001), but not by feeding method (2.74%)-exclusive breastfeeding vs. 5.34% formula (NS). The 3-month mortality rate stands at 1%. CONCLUSIONS: The 4.5% MTCT-rate of HIV-1 reported, confirms the feasibility and effectiveness of a district wide PMTCT programme using HAART in low-income settings.