In this research, we aimed at reporting the results of a cross-sectional epidemiological scanning performed on an outbreak of cyclosporiasis, occurring in a family and patients' socio-demographic epidemiological, clinical, diagnostic and therapeutic features, after detecting Cyclospora oocysts on stool sample of a person admitted to gastroenterology polyclinic. Scanning was performed in the neighborhood of the patient. The investigation group consisted of 75 individuals with diarrheal occurring from neighbor and family of patients. A questionnaire was performed for information on epicrisis of diarrheal persons and the samples were collected in stool containers. The samples were examined with native-lugol, sedimentation and modified acid fast staining methods. The stools were cultured in Salmonella-Shigella agar medium to investigate their bacteriological properties. The different vegetables from the mobile market place (peddler) founded in the neighborhood and water samples from house were collected to detect the infection source. Parasitosis (single or mix parasite) were encountered in 20 out of 75 persons in the examined samples (26.6%) and C. oocysts were detected in 13 out of 75 persons (17.3%). Out of the total number of patients having cyclosporiasis, none has immunodeficiency and chronic diseases. All cases were determined in the month of July. Oocysts were detected in six different families. Bacteria were not cultivated in stool cultures and occult blood was negative. The agent was not encountered in green vegetables, though water samples were examined to detect infection resource. Examination of the samples for Cyclospora was not neglected in diarrhea individuals; as such an examination was performed for the source of transmission of the infection. Cyclospora may generate family infection in individuals and if detected in one individual of a family, all the family individuals were examined for this infection.