A patient comes with a complaint of diarrhoea for 7 days, weight loss, reduced appetite. On stool examination, there are acid-fast oocyst of size 28 micrometres, symptoms subsided with clindamycin, the organism is
- These parasites normally infect the enterocytes of the small intestine and are spread by the oral faecal route. The definitive hosts are cats but other species including various species of rodents may be infected.
- Clinical signs include watery diarrhoea, vomiting, fever, and weight loss. The diagnosis is made by microscopic examination of the stool. Distinguishing between the species of Cystoisospora is most easily done with PCR. This method can also be used to make a diagnosis.
- Treatment is based on trimethoprim-sulfonamides with clindamycin or toltrazuril for resistant strains.