The clinical aspects of acute terminal ileitis were studied in 77 patients diagnosed macroscopically by operative findings. These cases were aged from 6 to 52 averaging 20.8 with sex ratio of 1:0.67, most of them were school age, and their average duration of symptoms was 3.3 days. Fever (75.3%) and diarrhea or loose stool (51.4%) occured more frequently and vomiting (12.2%) less frequently compared with acute appendicitis. The auther's 59 personal cases included 23 cases of proved Yersinia

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... the proof rate of 39%, i.e., 13 cases of Yersinia enterocolitica and a case of Yersinia pseudotuberculosis isolated by the stool or appendix culture, and 15 cases were positive for serum agglutination test of Yersinia enterocolitica.