Epidemiological study of human Cryptosporidiosis in Varamin area

Cryptosporidiosis is a wide spread cause of diarrhea disease of humans and many mammals caused by infection of intestinal epithelial cells with protozoan agent Cryptosporidium. This study was designed to evaluate epidemiological prevalence of the human cryptosporidiosis of Varamin area in 2012-2013. The study population comprised 930 human with diarrhea. During the 12 months a total of 930 human fecal samples were collected and one portion of each sample was stored at 4°C and the remaining was stored in potassium dichromate solution until processing. Cryptosporidium oocysts were identified by using formalin detergent concentration and modified Ziehl-Neelsen staining method. The infection rate was  %5.17 in age group 1-10 years , %3.74 in 11-20 years , %4.14 in 21-30 years , %3.41 in 31-40 years, %2.43 in 41-50 years and %1.28 in 51-60 years. In this study a correlation was observed between cryptosporidial infection with human age that a statistically significant difference found between age and prevalence of crytosporidiosis. Because Cryptosporidiosis is a zoonosis infection, the prevalence of Cryptosporidiosis detected in this study suggested that the close interaction between livestock and human in Varamin rural areas may play a role in crytosporidiosis transmission to human.