Urinary concentration of corticoids in normal horses and horses with hyperadrenocorticism.
The urinary corticoid:creatinine (c:c) ratio was determined in eight horses with hyperadrenocorticism (HAC). The mean (+/- SD) urinary c:c ratio of the eight horses with HAC (29 +/- 14 x 10(-6)) was significantly (P < 0.05) greater than the ratio in seven control horses (11 +/- 4.3 x 10(-6)). The urinary concentration of corticoids in control horses (201 +/- 60.4 nmol litre-1) was significantly (P < 0.05) lower than in horses with HAC (664 +/- 291 nmol litre-1). The urinary creatinine concentrations did not differ significantly (P > 0.05) between both groups. As both false negative and false positive cases were found, it is concluded that a measurement of the urinary c:c ratio in the horse should not be used as the sole test to confirm equine HAC.
van der Kolk
J H
JH
Department of Large Animal Medicine and Nutrition, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
Kalsbeek
H C
HC
Wensing
T
T
Breukink
H J
HJ
D000305:Adrenal Cortex Hormones / Q000652:urine*; D000308:Adrenocortical Hyperfunction / Q000175:diagnosis / Q000652:urine / Q000662:veterinary*; D000818:Animals; D003404:Creatinine / Q000652:urine; D005260:Female; D006734:Horse Diseases / Q000175:diagnosis / Q000652:urine*; D006736:Horses; D006854:Hydrocortisone / Q000097:blood
D000305:Adrenal Cortex Hormones; D003404:Creatinine; D006854:Hydrocortisone