Emergence of drug-resistant HIV-1 after intrapartum administration of single-dose nevirapine is substantially underestimated.

Abstract excerpt

Conventional sequence analysis detects human immunodeficiency virus (HIV)-1 drug resistance mutations in approximately 40% of women shortly after they receive intrapartum single-dose nevirapine (SD-NVP). Using sensitive real-time polymerase chain reaction assays for the K103N and Y181C resistance mutations, we tested genotyped virus before and after SD-NVP in 50 South African women infected with HIV-1 subtype C....

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