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Infection rates and distribution of Cryptosporidium spp. in preweaned dairy calves in Henan, China. (A) Infection rates of Cryptosporidium spp. in calves at 1 to 8 weeks of age. (B) Distribution of C. parvum, C. bovis, C. ryanae, C. andersoni, and mixed infections by age. N, number of samples examined.
