مقايسه ميزان سرمي تري يدوتيرونين و تيروكسين اسب هاي عرب در دو فصل سرد و گرم در اهواز

The comparison of serum levels of T3 and T4 in hot and cold seasons in Arab horses in Ahvaz

For diagnosis of thyroid dysfunction, measurement of total ʹ1ʹ, or T. concentration must be interpreted with caution. There is considerable variability with age, breed and environmental temperature as well as a wide range of normal values, The objective of this study "as the determination and comparison of serum levels otT. and T. of Arab horses in cold and hot seasons in Ahvaz. Fifty horses were studied and radioimmunoassay method was used to measure ʹ1ʹ, and T., The results showed that the values of mean of T 1 and T. were II R,9i43 ng/dl and O,R6±O.07 ug/dl, respectively, The serum level ofT; in cold seasons was significantly higher than hal seasons (P