Pathology of concurrent pasteurellosis, fasciolopsiasis and sarcocystosis in a non-descript grower pig

A three months old nondescript female pig carcass was submitted to postmortem facility, division of pathology, ICAR-IVRI, Izatnagar, Uttar Pradesh, India. Concurrent infections with F. buski, Pasteurella and Sarcocystis were detected based on cultural examination, Gram staining of bacteria and morphology of parasites. On necropsy examination, gross lesions observed were hydrothorax and hydroperitoneum, frothy exudate in trachea, severe congestion, consolidation and edema of lungs, lymphadenitis, hepatitis with whitish necrotic foci and prominent lobular pattern, congestion of kidneys, meningeal and mesenteric blood vessels and serosa of small intestine. Histologically, acute fibrino-suppurative bronchopneumonia, myocarditis with sarcocysts, enteritis, hepatic necrosis with thickened capsule and interlobular septa, perivascular cuffing, perivascular and perineuronal oedema in brain, lymphoid necrosis and depletion were observed. The case was diagnosed as acute fibrino-suppurative bronchopneumonia and septicaemia caused by Pasteurella spp. associated with cardiac sarcocystosis and intestinal fasciolopsiasis.