Thyroid Hormone Levels in Thoroughbred Mares and Their Foals at Parturition
نویسندگان
چکیده
A high percentage of Thoroughbred mares and their foals on two large farms in central Kentucky were found to have low thyroid hormone levels (lower than established levels) at the time of parturition, even though management on the farms near the time of foaling varied. A number of factors were identified that could have contributed to the low levels of thyroid hormones in these mares and foals, which further substantiates how complex thyroid dysfunction is in horses and how difficult it is to diagnose. Attempts at treatment appeared to have little, if any, beneficial effect relative to thyroid function and may have contributed to the low thyroid hormone levels. Authors’ addresses: Dept. of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, 379 E. Campus Dr., Columbia, MO 65211 (Messer); Rood & Riddle Equine Hospital, 2150 Georgetown Rd., Lexington, KY 40580 (Riddle); Dept. of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Ft. Collins, CO 80523 (Traub-Dargatz); USDA: APHIS, Centers for Epidemiology and Animal Health, Ft. Collins, CO 80521 (Dargatz); Animal Health Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, Lansing, MI 48909-7576 (Refsal); and Dept. of Animal Science, Louisiana State University, Baton Rouge, LA 70803 (Thompson). r 1998 AAEP.
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