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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Publicado: 2009
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Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00424900_v165_n25_p743_Mejia
http://hdl.handle.net/20.500.12110/paper_00424900_v165_n25_p743_Mejia
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spelling paper:paper_00424900_v165_n25_p743_Mejia2023-06-08T15:04:50Z Effect of anthelmintics on reproductive performance and first-lactation culling rate in Holstein heifers 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). 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00424900_v165_n25_p743_Mejia 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
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).
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
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00424900_v165_n25_p743_Mejia
http://hdl.handle.net/20.500.12110/paper_00424900_v165_n25_p743_Mejia
_version_ 1768546620787392512