Most animals infected with coccidia are asymptomatic, but young or immunocompromised animals may suffer severe symptoms and death.
While coccidia can infect a wide variety of animals, including humans, birds, and livestock, they are usually species-specific. One well-known exception is toxoplasmosis caused by Toxoplasma gondii.[1][2]
Humans may first encounter coccidia when they acquire a young puppy or kitten that is infected. Other than T. gondii, the infectious organisms are canine and feline-specific and are not contagious to humans, unlike the zoonotic diseases