Prevention and treatment of perinatal HIV-1 infection in the developing world

Measures to reduce mother-to-child transmission of HIV-1 are discussed acco rding to the presumed timing of transmission. Long course antiretrovirals c an substantially decrease intrauterine transmission, Antiretrovirals and ca esarean section reduce vertical transmission by preventing intrapartum tran smission; but caesarean section is unsuitable for most developing countries . Short and very short course antiretrovirals have an efficacy rate of abou t 50% in non-breastfeeding populations compared with just under 40% at 6 mo nths and between 23 and 30% at 15-24 months in breastfeeding women. The lat ter is due to the fact that postnatal transmission occurs as long as breast feeding continues. Breastfeeding accounts for a third to a half of overall transmission. Exclusive rather than mixed breastfeeding appears to diminish the risk of transmission, and HIV-infected women who choose to breastfeed should be advised to give breastmilk exclusively for a maximum of 5-6 month s. Curr Opin Infect Dis 13:247-251. (C) 2000 Lippincott Williams & Wilkins.