Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers

Female Holstein calves were treated with ivermectin from birth to first oestrus to study the effect of parasitic burden and anthelmintic treatment on reproductive and productive performance. First oestrus, age at first service and age at calving were advanced by 30, 70 and 110 days, respectively (P&...

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Autores principales:	Mejía, M.E., Perri, A.F., Miglierina, M.M., Formía, N., Becú-Villalobos, D., Lacau-Mengido, I.M.
Formato:	JOUR
Materias:	anthelmintic agent ivermectin age animal animal parasitosis article breeding cattle cattle disease chemistry drug effect estrus female lactation milk physiology randomization reproduction secretion Age Factors Animals Anthelmintics Breeding Cattle Cattle Diseases Estrus Female Helminthiasis, Animal Ivermectin Lactation Milk Random Allocation Reproduction Animalia
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00424900_v165_n25_p743_Mejia
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00424900_v165_n25_p743_Mejia
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spelling	todo:paper_00424900_v165_n25_p743_Mejia2023-10-03T14:51:24Z Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers Mejía, M.E. Perri, A.F. Miglierina, M.M. Formía, N. Becú-Villalobos, D. Lacau-Mengido, I.M. anthelmintic agent ivermectin age animal animal parasitosis article breeding cattle cattle disease chemistry drug effect estrus female lactation milk physiology randomization reproduction secretion Age Factors Animals Anthelmintics Breeding Cattle Cattle Diseases Estrus Female Helminthiasis, Animal Ivermectin Lactation Milk Random Allocation Reproduction Animalia Female Holstein calves were treated with ivermectin from birth to first oestrus to study the effect of parasitic burden and anthelmintic treatment on reproductive and productive performance. First oestrus, age at first service and age at calving were advanced by 30, 70 and 110 days, respectively (P<0.05), in ivermectin-treated animals compared with controls. No significant differences were observed in the conception rate, the number of services and the characteristics of the newborn calves and any problems at calving between the two groups. Daily milk yield, fat content in milk during first lactation and the concentrations of growth hormone, insulin-like growth factor type I, insulin and prolactin in serum were similar in both groups of cows. Culling during the first lactation was more common in untreated (47 per cent) than in treated (11 per cent) cows (P<0.05). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00424900_v165_n25_p743_Mejia
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	anthelmintic agent ivermectin age animal animal parasitosis article breeding cattle cattle disease chemistry drug effect estrus female lactation milk physiology randomization reproduction secretion Age Factors Animals Anthelmintics Breeding Cattle Cattle Diseases Estrus Female Helminthiasis, Animal Ivermectin Lactation Milk Random Allocation Reproduction Animalia
spellingShingle	anthelmintic agent ivermectin age animal animal parasitosis article breeding cattle cattle disease chemistry drug effect estrus female lactation milk physiology randomization reproduction secretion Age Factors Animals Anthelmintics Breeding Cattle Cattle Diseases Estrus Female Helminthiasis, Animal Ivermectin Lactation Milk Random Allocation Reproduction Animalia Mejía, M.E. Perri, A.F. Miglierina, M.M. Formía, N. Becú-Villalobos, D. Lacau-Mengido, I.M. Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers
topic_facet	anthelmintic agent ivermectin age animal animal parasitosis article breeding cattle cattle disease chemistry drug effect estrus female lactation milk physiology randomization reproduction secretion Age Factors Animals Anthelmintics Breeding Cattle Cattle Diseases Estrus Female Helminthiasis, Animal Ivermectin Lactation Milk Random Allocation Reproduction Animalia
description	Female Holstein calves were treated with ivermectin from birth to first oestrus to study the effect of parasitic burden and anthelmintic treatment on reproductive and productive performance. First oestrus, age at first service and age at calving were advanced by 30, 70 and 110 days, respectively (P<0.05), in ivermectin-treated animals compared with controls. No significant differences were observed in the conception rate, the number of services and the characteristics of the newborn calves and any problems at calving between the two groups. Daily milk yield, fat content in milk during first lactation and the concentrations of growth hormone, insulin-like growth factor type I, insulin and prolactin in serum were similar in both groups of cows. Culling during the first lactation was more common in untreated (47 per cent) than in treated (11 per cent) cows (P<0.05).
format	JOUR
author	Mejía, M.E. Perri, A.F. Miglierina, M.M. Formía, N. Becú-Villalobos, D. Lacau-Mengido, I.M.
author_facet	Mejía, M.E. Perri, A.F. Miglierina, M.M. Formía, N. Becú-Villalobos, D. Lacau-Mengido, I.M.
author_sort	Mejía, M.E.
title	Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers
title_short	Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers
title_full	Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers
title_fullStr	Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers
title_full_unstemmed	Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers
title_sort	effect of anthelmintics on reproductive performance and first-lactation culling rate in holstein heifers
url	http://hdl.handle.net/20.500.12110/paper_00424900_v165_n25_p743_Mejia
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Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers

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