ECOLOGICAL FACTORS AFFECTING HUMAN CRYPTOSPORIDIOSIS IN QALYOBIA GOVERNORATE
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Cryptosporidium is an important human pathogen that was though to be a rare opportunistic animal pathogen for several decades. Ecology of cryptosporidiosis in Qalyobia Governorate was considered in this study. Three hundred and twenty diarrheic children and 50 control below 5 years were examined for Cryptosporidium. The residence of detected cases were considered the foci of our environment search. This included 150 children in contact with animals in the same houses, 200 diarrheic and 50-non-diarrhoic control calves, 200 water samples, in addition to 200 soil samples and 50 samples of dust on the mammary gland of the calves. Samples were examined by modified Ziehl-Neelsen technique, Giemsa stain and aniline-carbol methyl violet technique after concentration. Results showed higher percentage of infection among younger children below the age 6 month (15.8%), while it was (13.5%) in rural communities. This was associated with high percentage of examined animal affection 21.5% and high percentage of canal water contamination 40%. This incriminate the farm animals as a reservoir and source of infection and canal water as a route of spread and propagation of infection.