Tuberculosis in Liver Transplant Recipients: A Single Brazilian Center Experience

Background. Tuberculosis (TB) is an important opportunistic infection in transplant recipients worldwide. The frequency of Mycobacterium tuberculosis disease varies among different regions, but the incidence of TB in adult liver transplant (LT) recipients is largely unknown. The estimated frequency ranges from 0.7% to 2.3%, with mortality rate up to 30%. However, these data are based on individual case reports or series with small samples. In LT recipients, therapy is generally associated with significant hepatotoxicity and interactions with immunosuppressive drugs. Methods. This retrospective analysis included 319 patients who underwent LT at University Hospital, Federal University of Minas Gerais, Brazil, between September 1994 and July 2007 and survived more than I month. Among these, TB was diagnosed in five patients. No patients received chemoprophylaxis before or after LT. Results. All five patients were women, mean age 39.6 +/- 16.5 years. Two patients had disseminated TB, two pulmonary involvement, and one extrapulmonary disease. Cultures were positive in four patients. Overall, four patients received isoniazid, rifampin, and pyrazinamide for 6 to 12 months, with good tolerance, but one patient presented recurrence. Another patient presented raised hepatic enzymes levels after initiating therapy. All patients are alive and well. Conclusions. In this series, the TB frequency after liver transplantation was 1.57%, with no confirmed hepatotoxicity with conventional treatment and an excellent survival rate (100%).