Of 34 Holstein-Friesian cattle in a dairy farm, 9 cows, 2 heifers and 3 calves showed anorexia, fever and muddy diarrhea, and
Salmonella Virchow was isolated from feces of 14 cows and 3 calves. After treating with antibiotics and others, clinical signs were improved, and the organism was not detected 4 months later. The unhygienic environment, unbalanced feeding,
Fasciola hepatica parasitism and tuberculin tests made on the day before that of the onset might be related with the occurrence.
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