Seroepidemiological studies with Campylobacter fetus.

324 sera from unselected male and 581 sera from female patients as well as 268 sera from prostitutes were studied for antibodies against Campylobacter fetus using the complement fixation test. Antigen was Campylobacter fetus subspecies intestinalis. 3.9% of the sera showed low but relevant antibody titers. Statistically significant differences don't exist between the three population investigated. Serological cross reactions could not be observed using Salmonella typhimurium, Shigella flexneri, Escherichia coli O119 and Klebsiella pneumoniae. Antigenic relationship however was observed with the subspecies jejuni and fetus.