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Titolo:
INFLUENCE OF TRIIODOTHYRONINE INJECTIONS ON CALF IMMUNE-RESPONSE TO AN INFECTIOUS BOVINE-RHINOTRACHEITIS VIRUS CHALLENGE AND NITROGEN-BALANCE OF LAMBS
Autore:
COLE NA; GALLAVAN RH; RODRIGUEZ SL; PURDY CW;
Indirizzi:
US ARS,CONSERVAT & PROD RES LAB,PO DRAWER 10 BUSHLAND TX 79012 USDA,FORAGE & LIVESTOCK RES STN EL RENO OK 73036
Titolo Testata:
Journal of animal science
fascicolo: 5, volume: 72, anno: 1994,
pagine: 1263 - 1273
SICI:
0021-8812(1994)72:5<1263:IOTIOC>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNDERNOURISHED WEANLING MICE; PRIMARY ANTIBODY-RESPONSE; RED BLOOD-CELLS; THYROID-HORMONE; FEED-INTAKE; SHEEP; PROPYLTHIOURACIL; CATTLE; STEERS; SERUM;
Keywords:
TRIIODOTHYRONINE; STEERS; LAMBS; IMMUNITY; STRESS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
N.A. Cole et al., "INFLUENCE OF TRIIODOTHYRONINE INJECTIONS ON CALF IMMUNE-RESPONSE TO AN INFECTIOUS BOVINE-RHINOTRACHEITIS VIRUS CHALLENGE AND NITROGEN-BALANCE OF LAMBS", Journal of animal science, 72(5), 1994, pp. 1263-1273

Abstract

Three experiments were conducted to determine the influence of triiodothyronine (T-3) or propylthiouracil (PTU) on the humoral immune response of calves challenged with infectious bovine rhinotracheitis virus (IBRV) and on nitrogen depletion and repletion of lambs deprived of feed and water for 3 d. In Exp. 1, 18 steer calves (BW 284 +/- 6 kg) challenged with IBRV were limit-fed (1.5% BW) a 60% concentrate diet and injected (s.c.) daily with alkaline saline, .4 mg of T-3, or .8 mg of T-3 Injections of T-3 did not affect serum antibody titers to IBRV, blood leukocyte counts, or plasma free fatty acid, ceruloplasmin, and cholesterol concentrations but increased (P < .05) plasma glucose concentrations and decreased (P < .05) plasma urea N concentrations. In Exp.2, 36 IBRV-challenged steers (BW 266 +/- .8 kg) were given ad libitumaccess to a 60% concentrate diet and injected (s.c.) daily with alkaline saline, .2 mg of T-3, or .4 mg of T-3. In contrast to Exp. 1, injections of T-3 did not affect plasma glucose or urea N concentrations and reduced (P < .05) serum antibody titers to IBRV. In Exp. 3, eight wether lambs were limit-fed (600 g/d) a 36% concentrate pelleted diet and assigned to one of four treatments in a replicated 4 x 4 Latin square designed nutrient balance experiment involving periods of nutrient depletion and repletion. Treatments were as follows: 1) alkaline saline injection (s.c.), 2) 4 mg of PTU/kg BW in water, 3) .15 mg of T-3 s.c. daily for 15 d, and 4) .15 mg of T-3 s.c. daily for 7 d after the 3-d feed and water deprivation period. Thyroid status affected (P < .05) predeprivation N balance but did not affect N losses during the feedand water deprivation period. Retention of N during realimentation was affected (P < .05) by T-3 treatment. Results of these experiments indicate that there is a complex interrelationship among stress, nutrient status, and thyroidal status and that the effects of T-3 injections on immune and metabolic responses may he dependent on the nutritional status of the animal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/10/20 alle ore 02:03:49