Ochratoxicosis in Iowa swine.

Ochratoxicosis was diagnosed in 2 Iowa swine herds. In both cases, clinical signs consisted of increased urination and water consumption. Pale tan kidneys were found in affected pigs at necropsy. Histologic examination of renal tissue from an affected pig revealed diffuse tubular nephrosis and interstitial fibrosis. In both cases, ochratoxin A was detected by thin-layer chromatography in extracts of whole corn and ground complete feed. Ochratoxicosis was reproduced in swine with feed obtained in one of the cases.