Calf Diarrhoea Rapid Test (Rotavirus, Coronavirus, Cryptosporidium & E. coli K99)

Diarrhoea, often called scour, is one of the most common problems in young calves. It can make a calf lose water and body salts very quickly, so a calf with diarrhoea, weakness or a dry mouth should be seen by a vet promptly. Several germs can cause it, and more than one can be present at the same time. Common infectious causes in young calves include rotavirus, coronavirus, Cryptosporidium, which is a tiny parasite, and E. coli K99, a type of bacteria. Feeding problems and other infections can also cause diarrhoea.

This rapid kit tests a small amount of fresh dung for several of these germs at once. It looks for antigens, which are parts of the germs, and shows a coloured line for each germ the kit covers. Kits differ, but they typically cover rotavirus, coronavirus, Cryptosporidium and E. coli K99; the exact list is confirmed when you book. Knowing which germ is present helps your vet choose care for the calf and plan steps for other calves on the farm. Cryptosporidium can pass to people, so wear gloves when handling sick calves or dung samples, wash your hands well and see a doctor if you feel unwell.

The test has limits. A negative result does not rule out every cause, because the kit does not look for other germs, such as coccidia or BVD virus, and germs may be present in low numbers. A positive result shows the germ was found, but healthy calves can carry some of these germs too. The sample should be fresh and collected in a clean container, ideally before treatment starts, but a sick calf should never wait for the test. A registered veterinarian reads the result with the calf's age, signs and farm history.