By biopsy epithelial intestinal look pathology and infectious stages of brush-border of epithelial cells, mostly. Rely on the detection of oocyst in feces. Patients by staining with iodine, Giemsa Modified cold Kinyoun acid fast (MCK),Rapid dimethyl sulfoxide modified acid fast (DMSO), Modified Koster (MK), Safraninmethylene blue (S-MB) and modified Ziehl-Neelsen. Acid fast (MZN) techniques. Also use the examination on reaction lymph (serology) such as indirect immunofluorecent. Test or use enzyme immunoassay etc.