Four cases of hepatic granulomatosis with positive Yersinia serologic tests are reported. In one case, the Wright serodiagnostic tests were also positive. In the three other cases, no other likely etiology was demonstrated. The authors recall the main causes of hepatic granulomatosis, diagnostic criteria of Yersiniosis infections, and the possible occurrence of simultaneous positive serodiagnostic tests for Yersinia enterocolitica type 9 and Brucella abortus.
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