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Table 1 Hepatitis B virus polymerase gene variants characterized by clonal analysis during the follow-up

From: Unsuccessful therapy with adefovir and entecavir-tenofovir in a patient with chronic hepatitis B infection with previous resistance to lamivudine: a fourteen-year evolution of hepatitis B virus mutations

Sampling date

Treatment

Resistance mutations*

Jun-98

IFN

wt

Feb-01

LMV

(15/15) M204I

May-01

No

(14/15) wt + (1/15) I233V

May-02

No

ND

Nov-03

LMV

ND

Sep-04

LMV

ND

Ago-05

LMV

ND

Jul-06

ADF

(15/15) L180M/M204I

Dec-08

ETV+TDF

(17/18) L180M/M204I + (1/18) T184L

May-09

ETV+TDF

(13/15) L180M/M204I + (1/15) T184L + (1/15) A181T

Nov-09

ETV+TDF

(15/15) L180M/M204I

  1. (*) The proportion of clones is shown between parentheses. The resistance associated mutations detected with prevalence > 20% are bolded; wt: wild type; ND: not done