The objective of this work was to evaluate the influence of age, sex, management and pregnancy status on aspartate aminotransferase (AST), creatine kinase (CK) and gamma-glutamyltransferase (GGT) enzymes serum activities of Crioulo horses. One hundred and forty-two horses, divided into six group were analyzed: yearlings; free activity of adult horses; training adult horses; male adult horses; nonpregnant and pregnant females. The CK enzyme activity value was higher in adult horses than in yearlings, and the same result was found when comparing free activity and training horses. Nonpregnant females had higher values for CK and GGT comparing to male horses, and CK values were higher in pregnant comparing to nonpregnant females. Age, sex, management and pregnancy status influence on CK serum activity, and sex influences on GGT serum activity.
serum biochemistry; muscular enzyme; hepatic disease; myopathy
