Definition of Coccidia
Coccidia are a group of internal parasites that most often live in the cells that line the gastrointestinal tract. They can also infect the liver and other organs. Coccidia parasites infect many domestic animals. Certain species of coccidia are extremely infectious to people, as well. These internal parasites cause intestinal inflammation (enteritis) in all species that they infect, although the course and severity of symptoms can vary quite a bit. Coccidiosis is an economically significant disease of sheep, cattle, pigs, poultry, rabbits and goats. It affects, but usually is less severe clinically, in fish, horses, dogs and cats.