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Viral Calf Enteritis¹

Pathology and Veterinary Science, University of Nebraska, Lincoln 68503

ABSTRACT

Intoduction

The problem of calf diarrhea in a herd may be continuous and affect all calves, may affect only calves from first calf heifers, or may occur after introduction of new animals. Calf diarrhea can be devastating when a newly assembled herd calves.

In the past, most cases of calf diarrhea have been diagnosed as colibacillosis. Strains of E. coli isolated from diarrheic calves have usually been resistant to available antibiotics. Other less frequent diagnoses have been salmonellosis, clostridial enteritis, and coccidiosis. Control and treatment methods based on bacteriological findings generally have not been satisfactory.

At the University of Nebraska we have worked with a reovirus-like agent (13, 18) and a coronavirus (15, 22) isolated from diarrheic calves and developed diagnostic methods (14) for detecting these agents in outbreaks of calf diarrhea. Detection of these viruses assists in making a specific diagnosis and, more importantly, helps locate those herds where unknown agents are involved.

¹ Published as Paper Number 4016, Journal Series, Nebraska Agricultural Experiment Station. Research was conducted under Project No. 14-001.