Card 22 / 27: On necropsy , a cow has histologic granulomatous inflammation of mesenteric lymph nodes. Gross thickening of intestinal wall with prominent folds. You think this is Johnes disease . What agent is this?
A) Mycobacterium avium supsp paratuberculosis
B) Enterotoxigenic E. Coli
C) Clostridium perfringens type C

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