Result: For
NNRTI resistance-associated mutations,
V179D/T was identified as the major mutation (20 cases), and the other 6 types of mutation were
E138A,
A98G,
K101P,
K103 N,
Y181H and
Y188H.
Discussion: L33F and
V179D/T are the types of mutation that confer potential low-level resistance.
Discussion: Even considering the previous report of occurrence in Hebei and Beijing, the mutation rate of
V179D/T up to 6.92% is still an astonishing level.