Abstract
This is the first report on the preliminary efficacy of 4 different short-course nucleoside analogue regimens (stavudine [d4T], didanosine [ddI], d4T+ddI, and zidovudine [ZDV]) for the prevention of mother-to-child transmission of HIV-1 (MTCT) in a resource-limited setting. This prospective open-label, randomized 4-arm study (May 1999 to May 2000) conducted in South Africa enrolled 373 women from 34 weeks of gestation; medication was continued through delivery and for 6 weeks to infants. MTCT rates were ascertained at birth, 6, 12, and 24 weeks of age. Mean maternal HIV-1 RNA levels decreased rapidly on treatment in all groups. At week 4, the mean decrease was 1.91 log10 copies/mL (c/mL) in the d4T+ddI group, 1.33 log10 c/mL in the ddI group, 1.12 log10 c/mL in the d4T group, and 0.76 log10 c/mL in the ZDV group. Among the 362 evaluable mother-infant pairs, 11 infants in the d4T group, 10 in the ddI group, 5 in the ZDV group, and 4 in the d4T+ddI group were infected by 24 weeks of age. Eleven infections occurred in utero. Treatment with d4T and ddI was not associated with lactic acidosis or hepatic steatosis. The abbreviated use of nucleoside analogues for the prevention of MTCT appears safe and effective.
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