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Hepatitis B e antigen (HBeAg)-negative chronic hepatitis B is difficult to treat and there is little long-term data for lamivudine treatment of severe acute exacerbation. We report a prospective, consecutive cohort of severe acute exacerbation of HBeAg-negative chronic hepatitis B patients treated by lamivudine between 1999 and 2004. All patients had respectively increased alanine aminotransferase and serum bilirubin to at least 10 and 2 times the upper limit of laboratory normal. Thirty-two patients were treated with lamivudine for 130 ±58 (range 48–217) weeks. Five patients had evidence of virological breakthrough (HBV DNA &gt;10,000 copies/ml) during lamivudine treatment. The cumulative probability of maintained response without any virological breakthrough was 94% (95% confidence interval [CI], 86–100%) at year 1, 94% (95% CI, 82–100%) at year 2 and 71% (95% CI, 41–100%) at year 3. At the last follow-up visit, 31 (97%) lamivudine patients had HBV DNA &lt;10,000 copies/ml. The prevalence of lamivudine resistance mutation was 1 in 32 patients (3%; 95% CI, 0–9%) at year 1, 1 in 17 patients (6%; 95% CI, 0–17%) at year 2, 1 in 9 patients (11%, 95% CI, 0–32%) at year 3 and 1 in 4 patients (25%; 95% CI, 0–67%) at year 4 of lamivudine treatment. In conclusion, extended lamivudine treatment is associated with a high maintained virological response and a low rate of drug resistance in severe acute exacerbation of HBeAg-negative chronic hepatitis B.

Long-Term Lamivudine Treatment is Associated with a Good Maintained Response in Severe Acute Exacerbation of Chronic Hbeag-Negative Hepatitis B