Abstract
Cryptosporidium species are frequently associated with diarrhea among patients and dairy herds are a possible source of some of these infections. The environmental distribution Cryptosporidium spp. is dependent upon human and animal sources. This study examined parasite prevalence in foals and humans to be contact them in Tabriz area in Iran. Fecal samples were collected from 87 foals and 36 humans in the horse farms. Cryptosporidium oocysts were identified by using sheather's concentration and the Ziehl–Neelsen modified staining technique in 6 of 87 foals (6.89%) ranging from less than 6 months of age and 2 of 36 humans (5.55%) ranging from less than 1 year of age to older than 52 years of age. This study was achieved in 4 farms. Overall prevalence of infection was 6.89%, but higher in foals 2-4 months of age (7.73%) and this was statistically significant (P<0.05). Both sexes of foals were infected with Cryptosporidium parasites, but prevalence were higher in diarrheic than in non-diarrheic foals. There was no association between the detection of Cryptosporidium and other gastrointestinal parasites. These results indicate that Cryptosporidium is enzootic among foals, and suggest that foals could have a role in zoonotic cryptosporidiosis.
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