Equine Alkaline Phosphatase

II.Normal Values of the Race Horse

Abstract

Normal values of plasma alkaline phosphatase of Thoroughbred horses were determined in relation to age and sex. The horses employed were those stood in the Utsunomiya Rearing Farm and in the Tokyo Race Course, and ages ranged 2 to 3 years in the Farm and 3 to 5 years or more in the Race Course. The enzyme activity decreased with the increase of age. However, no signifi cant difference between both sexes could be observed. Furthermore, it was found that, when the values of the horses of the same age of 3 years were compared, there was a significant difference between the values in the Farm and in the Race Course. It was presumed that the different environment or degree or manner of training might have caused such dif ference.