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Canadian Journal of Infectious Diseases and Medical Microbiology
Volume 2017, Article ID 4819594, 6 pages
Research Article

Cryptosporidium Contamination and Attributed Risks in Yunlong Lake in Xuzhou, China

1School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221000, China
2Department of Architecture Equipment and Civil Engineering, Jiangsu Vocational Institute of Architectural Technology, Xuzhou 221116, China
3JiangSu Collaborative Innovation Center for Building Energy Saving and Construct Technology, Xuzhou 221116, China

Correspondence should be addressed to Ping Lu; moc.621@tmucgnipul

Received 27 October 2016; Revised 6 January 2017; Accepted 23 February 2017; Published 12 March 2017

Academic Editor: Helieh S. Oz

Copyright © 2017 Yadong Kong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Swimming in surface water bodies (e.g., lakes, rivers) can expose the human body to substantial risk of infection by Cryptosporidium. These findings are from a one-year investigation on the occurrence and distribution of the protozoan parasite Cryptosporidium in Yunlong Lake, Xuzhou, China. Cryptosporidium oocysts were detected by immunofluorescence microscopy. From January to November of 2015, 180 samples (120 water samples and 60 sediment samples) were collected and analyzed. Among them, 42 (35%) water samples and 28 (47%) sediment samples tested positive for Cryptosporidium. The concentration of Cryptosporidium oocysts in the water samples was 0–8/10 L and 0–260/g in sediment samples. Results revealed that July was the highest risk period for both swimming and diving with an estimated probability of infection from swimming of greater than 18 per 10,000 swim sessions. It was concluded that swimming or diving in Yunlong Lake has a higher risk of Cryptosporidium infection than the acceptable risk level set by the United States Environmental Protection Agency. Thus, regular monitoring of water quality in recreation water bodies is strongly recommended.