Thyroid function in mature horses ingesting endophyte-infected fescue seed

Journal of the American Veterinary Medical Association

Volumn 223, Issue 3, 2003, Pages 340-345

  Breuhaus, Babetta A ^a  

^a NORTH CAROLINA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

LIOTHYRONINE; PROLACTIN; PROTIRELIN; THYROTROPIN; THYROXINE;

ANIMAL FOOD; ARTICLE; CONTROLLED STUDY; ENDOPHYTE; FEMALE; HORMONE DETERMINATION; HORSE; NONHUMAN; PLANT SEED; PREGNANCY; PROTIRELIN TEST; STATISTICAL ANALYSIS; TALL FESCUE; THYROID FUNCTION; THYROID HORMONE BLOOD LEVEL;

ANIMAL FEED; ANIMALS; FEMALE; FOOD MICROBIOLOGY; HORSE DISEASES; HORSES; HYPOCREALES; KINETICS; MALE; POACEAE; PROLACTIN; SEEDS; THYROID GLAND; THYROTROPIN; TRIIODOTHYRONINE;

ANIMALIA; EQUIDAE; EQUUS CABALLUS; FUNGI; NEOTYPHODIUM; NEOTYPHODIUM COENOPHIALUM; SCHEDONORUS ARUNDINACEUS;

EID: 0041865348     PISSN: 00031488     EISSN: None     Source Type: Journal    
DOI: 10.2460/javma.2003.223.340     Document Type: Article

References (42)

1. Hoveland CS. Importance and economic significance of the Acremonium endophytes to performance of animals and grass plant. Agric Ecosys Environ Appl Soil Ecol 1993;44:3-12.
2. Boosinger TR, Brendemuehl JP, Bransby DL, et al. Prolonged gestation, decreased triiodothyronine concentration, and thyroid gland histomorphologic features in newborn foals of mares grazing Acremonium coenophialum-infected fescue. Am J Vet Res 1995;56:66-69.
3. Brendemuehl JP. Reproductive aspects of fescue toxicosis. In: Robinson NE, ed. Current therapy in equine medicine 4. Philadelphia: WB Saunders Co, 1997;571-573.
4. Cross DL. Fescue toxicosis in horses. In: Bacon CW, Hill NS, eds. Neotyphodium/grass interactions. New York: Plenum Press, 1997;289-309.
5. Pederson JF, Lacefield GD, Ball DM. A review of the agronomic characteristics of endophyte-free and endophyte-infected tall fescue. Appl Agric Res 1990;5:188-194.
6. Brendemuehl JP, Boosinger TR, Shelby RA. Influence of endophyte-infected tall fescue on cyclicity, pregnancy rate and early embryonic loss in the mare. Theriogenology 1994;42:489-500.
7. Rohrbach BW, Green EM, Oliver JW, et al. Aggregate risk study of exposure to endophyte-infected (Acremonium coeniphialum) tall fescue as a risk factor for laminitis in horses. Am J Vet Res 1995;56:22-26.
8. Hood DM, Stephens KA. Physiopathology of equine laminitis. Compend Contin Educ Pract Vet 1981;3:545-459.
9. Hood DM. Thyroid function in horses affected with laminitis. Southwest Vet 1987;38:85-91.
10. Lowe JE, Baldwin BH, Foote RH, et al. Equine hypothyroidism: the long term effects of thyroidectomy on metabolism and growth in mares and stallions. Cornell Vet 1974;64:276-295.
11. Vischer CM, Foreman JH, Constable PD, et al. Hemodynamic effects of thyroidectomy in sedentary horses. Am J Vet Res 1999;60:14-21.
12. Breuhaus BA. Thyroid stimulating hormone in adult euthyroid and hypothyroid horses. J Vet Intern Med 2002;16:109-115.
13. Gutierrez DV, Riddle WT, Bramlage LR. Serum thyroxine concentrations and pregnancy rates 15 to 16 days after ovulation in broodmares. J Am Vet Med Assoc 2002;220:64-66.
14. Strickland JR, Cross DL, Jenkins TC, et al. The effect of alkaloids and seed extracts of endophyte-infected fescue on prolactin secretion in an in vitro rat pituitary perfusion system. J Anim Sci 1992;70:2779-2786.
15. Strickland JR, Cross DL, Birrenkott GP, et al. Effect of ergovaline, loline, and dopamine antagonists on rat pituitary cell prolactin release in vitro. Am J Vet Res 1994;55:716-721.
16. Labrie F, Meunier H, Godbout M, et al. Commentary: the DA receptor in the anterior and intermediate lobes of the pituitary. In: Kaiser C, Kebabian JW, eds. Dopamine receptors. Washington, DC: American Chemical Society, 1983;53-72.
17. Scanlon MF. Control of TRH and TSH secretion. In: Weetman AP, Grossman A, eds. Pharmacotherapeutics of the thyroid gland. New York: Springer-Verlag Inc, 1997;11-31.
18. Messer NT, Riddle T, Traub-Dargatz JL, et al. Thyroid hormone levels in Thoroughbred mares and their foals at parturition, in Proceedings. 44th Annu Conv Am Assoc Equine Pract 1998;44:248-251.
19. Bacon CW, Porter JD, Robbins JD, et al. Epichloe typhina from tall fescue grass. Appl Environ Microbiol 1977;34:576-581.
20. Rottinghaus GE, Garner CB, Cornell CN, et al. HPLC method for quantitating ergovaline in endophyte-infested tall fescue: seasonal variation of ergovaline levels in stems with leaf sheaths, leaf blades, and seed heads. J Agric Food Chem 1991;39:112-115.
21. Rottinghaus GE, Schultz LM, Ross PF, et al. An HPLC method for the detection of ergot contamination in ground feed-stuffs. J Vet Diagn Invest 1993;5:242-247.
22. Henneke DR, Potter GD, Kreider JL, et al. Relationship between condition score, physical measurements and body fat percentage in mares. Equine Vet J 1983;15:371-372.
23. Messer NT, Johnson PJ, Refsal KR, et al. Effect of food deprivation on baseline iodothyronine and cortisol concentrations in healthy, adult horses. Am J Vet Res 1995;56:116-121.
24. Colborn DR, Thompson DL Jr, Roth TL, et al. Responses of cortisol and prolactin to sexual excitement and stress in stallions and geldings. J Anim Sci 1991;69:2556-2562.
25. Glantz SA. Primer of biostatistics. 2nd ed. New York: McGraw-Hill Book Co, 1987;88-89, 265-277.
26. Elsasser TH, Bolt DJ. Dopaminergic-like activity in toxic fescue alters prolactin but not growth hormone or thyroid stimulating hormone in ewes. Domest Anim Endocrinol 1987;4:259-269.
27. Hurley WL, Convey EM, Leung K, et al. Bovine prolactin, TSH, T4 and T3 concentrations as affected by tall fescue summer toxicosis and temperature. J Anim Sci 1980;51:374-379.
28. Wachenheim DE, Blythe LL, Craig AM. Characterization of rumen bacterial pyrrolizidine alkaloid biotransformation in ruminants of various species. Vet Hum Toxicol 1992;34:513-517.
29. Westendorf ML, Mitchell GE Jr, Tucker RE. Influence of rumen fermentation on response to endophyte-infected tall fescue seed measured by a rat bioassay. Drug Chem Toxicol 1992;15:351-364.
30. Christensen RA, Malinowski K, Massenzio AM, et al. Acute effects of short-term feed deprivation and refeeding on circulating concentrations of metabolites, insulin-like growth factor I, insulin-like growth factor binding proteins, somatotropin, and thyroid hormones in adult geldings. J Anim Sci 1997;75:1351-1358.
31. Glade MJ, Gupta S, Reimers TJ. Hormonal responses to high and low planes of nutrition in weanling thoroughbreds. J Anim Sci 1984;59:658-665.
32. Glade MJ, Reimers TJ. Effects of dietary energy supply on serum thyroxine, tri-iodothyronine and insulin concentrations in young horses. J Endocrinol 1985;104:93-98.
33. Glade MJ. The role of endocrine factors in equine developmental orthopedic disease, in Proceedings. Annu Meet Am Assoc Equine Pract 1988;33:171-189.
34. Sticker LS, Thompson DL Jr, Bunting LD, et al. Feed deprivation of mares: plasma metabolite and hormonal concentrations and responses to exercise. J Anim Sci 1995;73:3696-3704.
35. Sticker LS, Thompson DL Jr, Fernandez JM, et al. Dietary protein and (or) energy restriction in mares: plasma growth hormone, IGF-I, prolactin, cortisol, and thyroid hormone responses to feeding, glucose, and epinephrine. J Anim Sci 1995;73:1424-1432.
36. Powell DM, Lawrence LM, Fitzgerald BP, et al. Effect of short-term feed restriction and calorie source on hormonal and metabolic responses in geldings receiving a small meal. J Anim Sci 2000;78:3107-3113.
37. Hohenboken WD, Berggren-Thomas PL, Beal WE, et al. Variation among Angus cows in response to endophyte-infected fescue seed in the diet, as related to their past calf production. J Anim Sci 1991;69:85-90.
38. Mizinga KM, Thompson FN, Stuedemann JA, et al. Effects of feeding diets containing endophyte-infected fescue seed on luteinizing hormone secretion in postpartum beef cows and in cyclic heifers and cows. J Anim Sci 1992;70:3483-3489.
39. Loch WE, Swantner LD, Anderson RR. The effects of four levels of endophyte-infected fescue seed in the diet of pregnant pony mares. J Reprod Fertil 1987;35(suppl):535-538.
40. McCann JS, Caudle AB, Thompson FN, et al. Influence of endophyte-infected tall fescue on serum prolactin and progesterone in gravid mares. J Anim Sci 1992;70:217-223.
41. Thompson DL Jr, Johnson L, Wiest JJ. Effects of month and age on prolactin concentrations in stallion serum. J Reprod Fertil 1987;35(suppl):67-70.
42. Putnam MR, Brendemuehl JP, Boosinger TR, et al. The effect of short term exposure to and removal from the fescue endophyte Acremonium coenophialum on pregnant mares and foal viability, in Proceedings. Int Symp Acremonium Grass Interact 1990;255-257.