4Causape A C, Quilez J, Sdnchez-Acedo C, et al. Prevalence and analysis of potential risk factors for Cryptosporidium parvum infection in lambs in Zaragoza (northeastern Spain)[J]. Vet Parasitol, 2002, 104(4): 287-298.
5Ryan U M, Bath C, Robertson I, et al. Sheep may not be an important zoonotic reservoir for Cryptosporidium and Giardia parasites[J]. Appl Environ Microbiol, 2005, 71(9):4992-4997.
6Xiao L, Herd R P, Rings D M. Diagnosis of Cryptosporidium on a sheep farm with neonatal diarrhea by immunofluorescence assays [J]. Vet Parasitol, 1993, 47(1-2) :17-23.