Cryptosporidium spp. and Giardia sp are protozoan of larger importance by their zoonotic potential. We studied the frequency of occurrence of these parasites in equidae from Araguari - Minas Gerais, slaughtered during February to March of 2008 and correlated with sex, species and origin. A total of 150 fecal samples were collected and specific techniques were used. The results showed 4% (6/150) of Giardia sp. in all the samples. The positivity was 4.23% (3/71) in females and 3.80% (3/79) in males. The positivity was 10.53% (2/19) in mules and 3.05% (4/131) in horses. The positive samples from Brazilian states was 16.67% (1/6) in Bahia, 7.69% (1/13) in Tocantins, 3.61% (3/83) in Minas Gerais and 2.08% (1/48) in Goiás. Cryptosporidium spp. were not found in any samples analyzed (n=150). We concluded that it is very important to study the frequency of these protozoans in horses, adding data to the; we also suggest molecular studies to associate with epidemiology and public health
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