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Cryptosporidium  is one of the most important parasites in poultry, and this pathogen can infect more than 30 avian species. The present study investigated the infection rate of  Cryptosporidium  among broiler chicken flocks. A total of 385 fecal samples from broiler chickens in 7 regions of Zhejiang Province collected from November 2010 to January 2012 were examined by microscopy. Thirty-eight (10%) samples were positive for  Cryptosporidium  infection, and 3 genotypes ( Cryptosporidium baileyi ,  Cryptosporidium meleagridis , and avian genotype II) were identified by PCR and sequencing. A phylogenetic tree of the isolates was analyzed. These results suggest that cryptosporidiosis is widespread in poultry in Zhejiang Province, and is a potential threat to public health as well as the economy. This is the first report about the infection rate and molecular characterization of  Cryptosporidium  in broiler chickens in Zhejiang.

Cryptosporidiosis in broiler chickens in Zhejiang Province, China: molecular characterization of oocysts detected in fecal samples