A presumptive diagnosis of viral gastroenteritis may be made on the clinical signs and/or histopathology, especially if immunocytochemical staining is used. Vomiting and diarrhoea with severe leucopenia early in the disease and characteristic post-mortem findings may strongly suggest CPV-2 infection. However, because of the lack of distinctive clinical or pathological features in many cases, a definitive diagnosis can only be made if the infectious agents are detected and identified.

Virus detection and isolation

Virus serology

Diagnosis of campylobacteriosis

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