[Isolation of Yersinia enterocolitica in acute ileitis]

2246 stool specimens were specifically testet for Yersinia enterocolitica during 1973/74. In one case it was possible to isolate a strain of Yersinia enterocolitica (0-group I of Knapp/Serotype 3 of Winblad) from the feces of a patient suffering of acute ileitis. A high agglutinine-titer was serologically detected against a bacterial suspension of the isolated strain as well as of a reference strain (Serotype 3 of Winblad). The antibody-titer was 1 : 3200 by the first examination and dropped to 1 : 160 after two months. A reisolation attempt was unsuccessful.