There are three types, Eimeria, Isospora and Cryptosporidia. Disease is common and widespread in sucking piglets but is seen occasionally in growing and finishing pigs and boars when they are moved or housed into continually populated and infected pens. Coccidiosis should be suspected if there is a diarrhoea problem in sucking pigs from 7-21 days of age that does not respond particularly well to antibiotics. Diarrhoea is the main clinical sign in early stages. In later stages the faeces vary in consistency and colour from yellow to grey green, or bloody according to the severity of the condition.
Dehydration is common.
Sloppy diarrhoea may be seen. Poor hygiene in farrowing pens. Poor wet floor surfaces. Creep feeding on the floor. Dried faeces behind the sow in lactation.