A survey on prevalence rate of cryptosporidial infection of farms in Shahriar county of Tehran and its hygienic importance in human

Cryptosporidiosis is a widespread cause of diarreheal diseases of humans، young calves، and many mammals caused by infection of intestinal epithelial cells with the protozoal agent Cryptosporidium. This study that was conducted in Shahriar county of Tehran in 2006، altogether 573 stools of calves and 867 stools from diarreheal humans refer to hospitals of county were collected and concentrated by Scheather’s method and stained with Ziehl-Neelsen dye method. Altogether، criptosporidiosis were detected from 69 (12. 04%) of calves and 24 (2. 7%) from human stools. In this study a correlation was observed between cryptosporidial infection with age، nutrition and the mode of breeding of calves.