8Blayburn B L, Linsay D S. Experimental eryptosporidiosis in broiler chichen[J]. Poult Sci, 1987,66 : 442-449.
9Fayer R, Ungar B L. Cryptosporidium ssp. and cryptosporidiosis[J]. Microbiol Rev, 1986,50 : 458-483.
10Current W L,Upton S J,Haynes T B. The life cycle of Cryptosporidium baileyin sp (Apicomplexa, Cryptosporidiidae) infeeling chickeus[J]. J Protozool, 1986,33,289-296.