Unusual Insertion and Deletion at Codon 67 and 69 of HIV Type 1 Subtype C Reverse Transcriptase Among First-Line Highly Active Antiretroviral Treatment-Failing South Indian Patients: Association with Other Resistance Mutations

Abstract

We report a high frequency of drug resistance mutations among patients with unusual insertions or deletions at the β(3)-β(4) hairpin-loop-coding region of HIV-1 subtype C reverse transcriptase, during failure of first-line antiretroviral therapy containing only reverse transcriptase inhibitors in Chennai, India.