It is thought to be a result of failure to obtain immunity from the milk. Sudden exposure to large numbers of infective organisms results in an overwhelming infection and usually death. The organisms involved are the protozoans Etmeria kogoni and E. cunnamullensis is excreted in the droppings. Remember that even healthy animals can excrete the organisms. Signs of infection can include depression, anorexia, gut pain, gastrointestinal haemorrhage, diarrhoea and sudden death.
Diagnosis is obtained via examination droppings under a microscope.
It is possible to have animals that are clinically ill but without organisms evident and clinically healthy and normal animals with organisms present. Animals with clinical symptoms will usually die despite intensive treatment with antibiotics, baycox and intravenous fluids. In contact animals should be treated with Bayycox immediately. Well drained, sun exposed yards tend to be less prone to coccidial organism build up. Regular removal of droppings is vital.