The Survey of Abundance of Cryptosporidium Spp. Oocysts in Diarrhoeic Calves in Yasuj City

Cryptosporidiosis is one of the most important protozoan zoonotic diseases which causes diarrhea in calves. Among different species of cryptosporidium spp., C.parvum, which is found all over the world, has importance in the newly born calves. Feces of 80 calves fewer than one month age with diarrhea were examined by MZN (Modified Ziehl-Neelsen) method at this survey. Cryptosporidium oocysts were found in 37 cases (46.25%). The infestation rates among pure, mixed and native breeds were 48.8%, 44.1% and 33.3% respectively and among three separate age groups of calves, under 10 days old, 10-19 days old and 20-30 days old were determined 60%, 53.8% and 53.5%   respectively.