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The aim of this study was to determine the prevalence of Cryptosporidium spp. in cattle calves kept under intensive and extensive management systems, and correlate the presence of this protozoan with age and fecal consistency of these animals. Stool samples from 356 calves up to one year of age, males and females, different breeds, were analyzed by techniques of modified Kinyoun and Sheather. Of all animals, 54.21% (193/356) were intended for beef cattle (extensive system) and 45.78% (163/356) for milk extraction (intensive system). Presence of Cryptosporidium spp. were observed in 7.58% (27/356) of animals, being 2.07% (4/193) and 14.11% (23/163) in beef calves and milk, respectively. Higher prevalence of oocysts was observed in animals aged less than 15 days, with the presence of diarrhea, which highlighted a statistically significant difference. Through these results we can infer that the management of livestock was an important factor for the occurrence of this parasite, with this type of infection favored by intensive breeding system adopted in dairy farming, occurring predominantly in animals aged less than 15 days and clinical signs of diarrhea.

OCORRÊNCIA DE Cryptosporidium spp. EM BEZERROS MANTIDOS SOB DOIS DIFERENTES SISTEMAS DE MANEJO