Some fallacies about this problem are that it is spread by unclean conditions. This is wrong it is carried from yard to yard by infected birds, droppings, feathers and flies. There is no cure for coccidiosis and puppies must develop a resistance to it. Adults may carry it and never exhibit any symptons because they have an immunity to this infectious problem. It is quickly spread threw a litter so all puppies should be treated.
Infection occurs upon ingestion of contaminated feces or food.
Upon ingestion, the parasite colonizes the lining of the small intestine and reproduction begins. As reproduction progresses the new coccidia are shed through the feces to the environment. Puppies are most commonly affected. Most infections are not apparent and resolve on their own by self immunization. Occasionally, signs will occur and can be quite severe.