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Campylobacter fetus bacteremia in an immunocompromised patient: case report and review of the literature.

A 33-year-old woman underwent a liver transplantation and splenectomy in 1985 and had followed immunosuppressive therapy until 1995. Afterwards a non-Hodgkin lymphoma was diagnosed and chemotherapy was started. In January 2000, because of suspect transplantation rejection she was treated with steroid and immunosuppressive therapy. Fever occurred after two months and Cytomegalovirus (CMV) infection was diagnosed. Ganciclovir was started with clinical remission. In November 2000 fever recurred without clinical symptoms. Lymphoma recurrence was excluded and CMV was detected by PCR in several biological fluids. Blood cultures were positive for a bacterium that was identified as Campylobacter fetus. The patient was successfully treated with intravenous ciprofloxacin. For persistent CMV viremia therapy with gancyclovir was stopped and foscarnet was used (60mg/Kg/tid i.v. for two weeks). Bacteremia due to C. fetus is rare, occurring mainly in immunocompromised patients. In our patient the immunosuppressive therapy, chemotherapy for lymphoma and CMV infection had made the patient susceptible to bacteremia with this infrequently found bacterium. The clinical microbiologist should be aware of this infection in immunocompromised hosts.