Tehran University of Medical Sciences Iranian Journal of Parasitology 1735-7020 5 2 2010 06 15 26 32 EN AH Al-Shamiri Department of Applied Microbiology, Faculty of App. Science, Taiz University, Taiz, Yemen AH Al- Zubairy Department of Applied Microbiology, Faculty of App. Science, Taiz University, Taiz, Yemen RF Al-Mamari Department of Applied Microbiology, Faculty of App. Science, Taiz University, Taiz, Yemen 2015 10 03 Background: This is the first work done on cryptosporidiosis among the children in Taiz, Yemen. Methods: A number of 712 samples were collected from children of different ages (ranging from 1 month to 12 years) from Dec 2006 to Aug 2007. The collected samples were examined by Sheather's sugar floatation and Modified Ziehl- Neelsen stain as well as ELISA methods. The test results were statistically analyzed by SPSS software. Results: The overall positive percentage was 43.7%. The higher incidence (36.2 %) was oc­curred in males while the lowest incidence (32.7 %) was observed in females (r= 0.876; P= 0.001). The correlation between infected cases and the type of drinking water was r =0.121. Among the cases examined by ELISA (92 cases), 26.1 % were infected. The correlation be­tween seropositivity and gender was r= 0.652 (P=0.031). Conclusion: Cryptosporidium spp. is a significant pathogen among children at Taiz. Fresh water supplies, education, eating habits and domestic animals are considered the main sources for transmission of cryptosporidiosis. https://ijpa.tums.ac.ir/index.php/ijpa/article/view/132 https://ijpa.tums.ac.ir/index.php/ijpa/article/download/132/131