“…Some factors can be postulated as causes of such occurrence, among these, subclinical parasitism. The obtained WBC indexes were higher than those described in the literature for other breeds (Mullen and Hopes, 1979;Lumsden et al, 1980;Rose and Rodgson, 1994;Feldman et al, 2000). However, it should be noted that hematological parameters are influenced by various factors, including the time of sampling, diet, temperament of the horse, and conditioning and physical activities as well (Rose e Rodgson, 1994).…”