Dogs are infected by I.canis, I.ohioensis, I.burrowsi and I.neorivolta.
Cats are infected by I.felis and I rivolta
Guinea Pigs are usually infected with Eimeria caviae
Coccidia have a sexual and an asexual phase to their lifecycle and sometimes these occur in different host species (as with Sarcocystis), in other cases (e.g. Isospora) both phases occur in the same host. In the case of cats infected with Isospora felis , for example, oocysts may be passed by the cat and reingested by the same or another cat, or they may be ingested by an intermediate host (rodent - mouse) which is subsequently eaten by a cat.
The oocysts shed into the environment are very resistant to freezing
Fluid therapy for dehydration or blood transfusion if necessary for severe blood loss
Treat underlying cause of immune suppression if there is one.
Coccidiostatic drugs - stop their growth.e.g. sulphonamides (e.g. sulphadimidine) , trimethoprim-sulphonamide combinations, nitrofurazone. Amprolium is used by some veterinarians to control outbreaks in kennels (though it is not licensed for use in dogs).
Guinea Pigs - treat with sulphadimidine 2% in drinking water for 7-10 days.
Long term problems