
24/06/2025
What is coccidiosis?
Coccidiosis is an intestinal protozoan parasitic infection in cattle, sheep and pigs. Coccidia in small numbers cause no harm and can be beneficial to increase immunity. However, younger stock, typically 3-12 weeks old, with low immunity or exposed to heavy infestation, are susceptible to disease.
The parasitic oocysts (eggs) can survive in the environment for over 12 months. When ingested, the parasites proliferate in the intestines, gut cells are destroyed, and the eggs are passed out in faeces. This lifecycle takes about 3 weeks. This multiplication can be explosive in the right conditions, with rapid disease spread amongst the group and several clinical symptoms, some of which can be severe.
Symptoms of coccidiosis:
• Diarrhoea, which may contain mucus or blood
• Straining
• Pain
• Weight loss
• Sometimes, deaths (especially in lambs)
• Poor growth rates
Diagnosis will consist of a simple faecal egg count, which can be dropped into any of our Farm Vet Solutions branches to be run. Speak to one of our vets or SQPs today for more information on: 01664 491266