Studding the Prevalence of Cryptosporidiosis among Human, Calf and Wild Rat Papulations in Tabriz

The aim of this research was to study the prevalence of Cryptosporidium in human and some animals that have close relationship with human. In order, 100 samples of feces referred to Parasitology department of central laboratory of East Azerbaijan province (Tabriz city) were studied with light microscopy after staining with Modified Ziehl-Nelson method and then 100 feces samples of calves around Tabriz were collected, and at last the feces samples collected from 50 wild rats from different parts of Tabriz and were studied. Result of this study was showed that prevalence of infestation was 12%, 16% and 74% in humans, calves and rat respectively. According to these results, the infestation was high in three studied group (human, calves and rats) and it can be related with its wide distribution and it’s a lot of hosts. Cryptosporidium oocysts are reason for disease transmission between human and animals. Regarding that medical and veterinarian laboratories usually don’t care about Cryptosporidium in diarrhea cases, there is possibility of increase in Cryptosporidium prevalence and incidence in future.