The polymerase chain reaction (PCR) was evaluated for its ability to diagnose perinatal HIV-1 infection before the development of signs or symptoms of the disease in thirty-seven infants (median age of 5.5 days) born to HIV-1 infected women. Of 30 children with complete follow up (median of 25 months), 9 (30%) had serological and clinical features of HIV-1 infection and 21 (70%) were uninfected. Among the infected infants, 5/9 (56%) had positive neonatal PCR tests and 4/9 (44%) had negative PCR tests. None of the 21 uninfected children had positive PCR tests. The prognosis of HIV-1 disease in infected infants with a positive neonatal PCR positive test was similar to that of infected infants with a negative PCR test. In spite of not identifying all the infected infants, the PCR test is a useful tool for early diagnosis of HIV-1 perinatal infection, detecting infected newborns during gestation.
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