Coccidia

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What is Coccidia?

Coccidia are a single-celled parasite that destroys a host animal's intestinal cells. The presence of coccidia can cause diarrhea in the host.

Coccidia begins with oocysts. When the host animal consumes oocysts, they break open and release sporozoites into the intestines. The sporozoites go on to infect intestinal cells, where they divide rapidly over and over until a new stage called merozoite begins. The merozoites divide and reproduce rapidly, filling the intestinal cell until it bursts. They go on to infect and destroy more intestinal cells. They also go on to create more oocysts.

Symptoms

Transmission

Coccidia is passed through the feces of an infected animal. The oocysts are not infective when they are first passed, but mature within 12-36 hours of being outside of the body. Coccidia is contracted when an animal consumes contaminated soil or water containing the oocysts. 

Coccidia can not be spread between different species. While both dogs and cats can contract coccidia, they are different strains that are species-specific. Humans can not contract coccidia from other animals.

After infection, it can take 3-11 days to show symptoms. The bursting of the intestinal cells is what causes the diarrhea, so enough cells need to be destroyed for the symptoms to start. Infection is more common in kennel situations where animals are housed in groups.

Diagnosis and Treatment

A stool sample will be needed to diagnose your foster. Vet services will schedule a time for you to bring it to the shelter to test. Coccidia is found by viewing the sample under a microscope. Small amounts of coccidia can be hard to detect, so multiple tests may be necessary if the diarrhea continues for an extended period of time.

If your foster is Coccidia+, vet services will prescribe you a coccidia-specific medication to get rid of the parasite. 

Protecting You and Your Pets

Environmental Disinfection