Following the observation of the decreasing occurrence of
campylobacteriosis in HIV-infected patients. This study examines the incidence of
campylobacteriosis in patients who had received
rifabutin prophylaxis against Mycobacterium avium complex (MAC)
infection compared with the incidence observed among patients treated before the advent of
rifabutin. A retrospective analysis (February 1992 to November 1995) was conducted in a hospital HIV inpatient unit. The study included two patient groups: 73 HIV-infected patients with CD4 counts of < 100 cells/microL (mean 30 cells/microL) who were treated between February 1992 and July 1993 and who had not received
rifabutin prophylaxis (Group R-), as well as 90 HIV-infected patients with CD4 counts of < 100 cells/microL (mean 22 cells/microL) who had received
rifabutin 300 mg/day as primary prophylaxis against MAC
bacteremia between July 1993 and November 1995 (Group R+). For the patient population as a whole, 20 episodes of
campylobacter infection were observed in 13 patients. Causative pathogens were Campylobacter jejuni (n = 10), C. coli (8), and unidentifiable (2). Seventeen episodes (in 12 patients) of
campylobacter infection occurred in Group R- versus 3 episodes (in 2 patients) in Group R+ (p < 0.0005). The rate of symptomatic
infection per 100 patient-months was 0.251 in Group R+ versus 2.02 in Group R-. The results of this study indicate that
rifabutin prophylaxis was associated with a decrease in the rate of
campylobacter infection in HIV-infected patients. These findings are supported by evidence that
rifabutin is active against C. jejuni in vitro.