1Department of Pathobiology, Faculty of Veterinary Medicine, University of Urmia, Urmia, Iran
3Department of Basic Sciences, Faculty of Veterinary Medicine, University of Urmia, Urmia, Iran
To investigate the prevalence of Cryptosporidium infection in horses, a total of 221 faecal specimens were collected from 18 villages of Urmia, northwestern Iran. The samples were studied microscopically by modified Ziehl-Neelsen staining. The cryptosporidial infection was found in the collected samples from 11 of 18 villages. Although the prevalence of the infection was 15.8%, none of the infected horses appeared clinically ill.