[Enteritis caused by atypical Yersinia (author's transl)].

For the first time in the Federal Republic of Germany Yersinia species "frederiksenii", "kristensenii", "serovar 0 : 6" (each once) and "serovar 0 : 5" (twice) were found in the stool of 5 patients with gastroenteritic complaints. Serum agglutinins against these species could not be demonstrated. Other enteropathogenic microorganisms were excluded microscopically, by culture and serologically. These Yersinia isolates were resistant against penicillin G, ampicillin, carbenicillin, ticarcillin, and cefalotin.