Endocrine studies in ivermectin-treated heifers from birth to puberty
Continuous treatment with ivermectin from birth to puberty advanced sexual maturation by 3.7 wk in Holstein heifers grazing pastures naturally infected with nematodes. Every 14 d jugular blood samples were taken from birth to 45 wk of age from all heifers. No differences in serum FSH, estradiol, or...
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American Society of Animal Science
2000
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 15313caa a22015137a 4500 | ||
|---|---|---|---|
| 001 | PAPER-21059 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518205229.0 | ||
| 008 | 190411s2000 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0034169033 | |
| 024 | 7 | |2 cas |a Antinematodal Agents; Estradiol, 50-28-2; Follicle Stimulating Hormone, 9002-68-0; Insulin-Like Growth Factor I, 67763-96-6; Ivermectin, 70288-86-7; Luteinizing Hormone, 9002-67-9; Progesterone, 57-83-0; Thyroxine, 7488-70-2 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Lacau-Mengido, I.M. | |
| 245 | 1 | 0 | |a Endocrine studies in ivermectin-treated heifers from birth to puberty |
| 260 | |b American Society of Animal Science |c 2000 | ||
| 270 | 1 | 0 | |m Lacau-Mengido, I.M.; Inst. de Biol. y Med. Experimental, CONICET, Obligado 2490, (1428) Buenos Aires, Argentina; email: ilacau@dna.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Yelich, J.V., Wettemann, R.P., Marston, T.T., Spicer, L.J., Luteinizing hormone, growth hormone, insulin-like growth factor-I, insulin and metabolites before puberty in heifers fed to gain at two rates (1996) Domest. Anim. Endocrinol., 13, pp. 325-338 | ||
| 504 | |a Zajac, A.M., Hansen, J.W., Whittier, W.D., Eversole, D.E., The effect of parasite control on fertility in beef heifers (1991) Vet. Parasitol., 40, pp. 281-291 | ||
| 520 | 3 | |a Continuous treatment with ivermectin from birth to puberty advanced sexual maturation by 3.7 wk in Holstein heifers grazing pastures naturally infected with nematodes. Every 14 d jugular blood samples were taken from birth to 45 wk of age from all heifers. No differences in serum FSH, estradiol, or thyroxine levels were observed during the trial between the treated and untreated group. Mean LH levels were diminished in untreated heifers 4 wk before the first estrus and the amplitude of LH pulses was augmented in treated heifers when puberty was reached. Serum IGF-I levels increased from birth to 22 wk of age and then reached a plateau in both groups, but levels were consistently higher in treated heifers from 26 wk of age onward. Body weight gain was retarded in parasitized heifers and IGF-I values were positively correlated with body weight only during the first 20 wk of life. We suggest that enhanced prepubertal IGF-I levels in conjunction with increased prepubertal LH levels and pubertal LH pulse amplitude might be involved in the accelerated somatic maturation and in puberty advancement observed in ivermectin-treated heifers. |l eng | |
| 593 | |a Inst. de Biol. y Med. Experimental, CONICET, Obligado 2490, (1428) Buenos Aires, Argentina | ||
| 593 | |a Esc. MLMC Inchausti, Universidad de La Plata, 25 de Mayo, Valdés, (6667), Pcia. Bs.As, Argentina | ||
| 690 | 1 | 0 | |a ESTRADIOL |
| 690 | 1 | 0 | |a GONADOTROPINS |
| 690 | 1 | 0 | |a HEIFERS |
| 690 | 1 | 0 | |a INSULIN-LIKE GROWTH FACTOR |
| 690 | 1 | 0 | |a IVERMECTIN |
| 690 | 1 | 0 | |a PUBERTY |
| 690 | 1 | 0 | |a ANTINEMATODAL AGENT |
| 690 | 1 | 0 | |a ESTRADIOL |
| 690 | 1 | 0 | |a FOLLITROPIN |
| 690 | 1 | 0 | |a IVERMECTIN |
| 690 | 1 | 0 | |a LUTEINIZING HORMONE |
| 690 | 1 | 0 | |a PROGESTERONE |
| 690 | 1 | 0 | |a SOMATOMEDIN C |
| 690 | 1 | 0 | |a THYROXINE |
| 690 | 1 | 0 | |a ANIMAL |
| 690 | 1 | 0 | |a ANIMAL DISEASE |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a BLOOD |
| 690 | 1 | 0 | |a CATTLE |
| 690 | 1 | 0 | |a DAIRYING |
| 690 | 1 | 0 | |a DRUG EFFECT |
| 690 | 1 | 0 | |a FEMALE |
| 690 | 1 | 0 | |a GROWTH, DEVELOPMENT AND AGING |
| 690 | 1 | 0 | |a METABOLISM |
| 690 | 1 | 0 | |a PARASITE IDENTIFICATION |
| 690 | 1 | 0 | |a RADIOIMMUNOASSAY |
| 690 | 1 | 0 | |a SEXUAL MATURATION |
| 690 | 1 | 0 | |a WEIGHT GAIN |
| 690 | 1 | 0 | |a ANIMALS |
| 690 | 1 | 0 | |a ANTINEMATODAL AGENTS |
| 690 | 1 | 0 | |a CATTLE |
| 690 | 1 | 0 | |a DAIRYING |
| 690 | 1 | 0 | |a ESTRADIOL |
| 690 | 1 | 0 | |a FEMALE |
| 690 | 1 | 0 | |a FOLLICLE STIMULATING HORMONE |
| 690 | 1 | 0 | |a INSULIN-LIKE GROWTH FACTOR I |
| 690 | 1 | 0 | |a IVERMECTIN |
| 690 | 1 | 0 | |a LUTEINIZING HORMONE |
| 690 | 1 | 0 | |a PARASITE EGG COUNT |
| 690 | 1 | 0 | |a PROGESTERONE |
| 690 | 1 | 0 | |a RADIOIMMUNOASSAY |
| 690 | 1 | 0 | |a SEXUAL MATURATION |
| 690 | 1 | 0 | |a THYROXINE |
| 690 | 1 | 0 | |a WEIGHT GAIN |
| 700 | 1 | |a Mejía, M.E. | |
| 700 | 1 | |a Díaz-Torga, G.S. | |
| 700 | 1 | |a Gonzalez Iglesias, A. | |
| 700 | 1 | |a Formía, N. | |
| 700 | 1 | |a Libertun, C. | |
| 700 | 1 | |a Becú-Villalobos, D. | |
| 773 | 0 | |d American Society of Animal Science, 2000 |g v. 78 |h pp. 817-824 |k n. 4 |p J. Anim. Sci. |x 00218812 |t Journal of Animal Science | |
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| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00218812_v78_n4_p817_LacauMengido |y Handle |
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| 999 | |c 82012 | ||