[Sudden death of outdoor housed pigs caused by Clostridium novyi. A case report].

In an outdoor pig-breeding unit of the Tierpark Arche Warder e. V. (Germany), 16 pigs of different age and sex died in October 2011. Necropsy findings revealed tympany, liver emphysema, subcutaneous oedema, haemopericardium, haemothorax, and intense gas bubble infiltrations in muscles. The stomachs were filled. The initial anaerobic bacteriological investigations gave negative results. In further analyses of tissue samples, the flagellin gene of C. novyi types A and B was detected using PCR. Based on the anatomical-pathological and bacteriological findings as well as PCR testing, a C. novyi infection was assumed to be the cause of the pig mortality.