cryptosporidium infection in a veal calf cohort in france: molecular characterization of species in a longitudinal study.abstract: feces from 142 animals were collected on 15 farms in the region of brittany, france. each sample was directly collected from the rectum of the animal and identified with the ear tag number. animals were sampled three times, at 5, 15 and 22 weeks of age. after dna extraction from stool samples, nested pcr was performed to amplify partial 18s-rdna and 60 kda glycoprotein genes of cryptosporidium. the parasite was detected on all farms. one hundred out of 142 calves (70.4%) were found to ...201122136667
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