[Fever, hepatic granulomatosis, electrocardiogram changes, and a positive serodiagnosis for Yersinia enterocolitica: two case reports (author's transl)].

Though no bacteria were isolated, a diagnosis of Yersinia enterocolitica infection was confirmed in two patients by strongly positive serology tests, with levels much above the normal. Both patients had fever, hepatic granulomatosis, and electrocardiogram anomalies, and there was associated dysuria and prostatitis in one case. The authors review the hepatic, urinary, and electrocardiogram manifestations reported in the published literature, and describe the antigenic and serologic relationships existing between Y. enterocolitica type 9 and Brucella abortus.