Testing calf manure and counting oocytes gives a clear indication of the severity of the coccidiosis infection. Photo: Ronald Hissink

Coccidiosis is an intestinal disease in young stock, caused by the Eimeria parasite. In general, calves come into contact with the parasite during rearing. This is not a bad thing, in the end the calf must build up resistance against this parasite. A low level of exposure is therefore desirable. Severe infections however, cause diarrhoea.

Coccidiosis is divided into 2 types:

  1. Coccidiosis of the hindgut (classical coccidiosis) and
  2. Coccidiosis of the small intestine (pasture coccidiosis).