Discussion: Many studies (Protzer-Knolle et al.,; Beckebaum et al.,; Cheung et al.,) have demonstrated that
M133T itself is frequently associated with occult
HBV infection and is also often associated with some mutations in the '
a' determinant such as
G130N,
F134L,
D144A,
D144G,
G145A,
G145K, and
G145R or failed hepatitis B immune globulin (HBIG) prophylaxis.