Hypovitaminosis A in two beef calves: case report in Buenos Aires province

Hypovitaminosis A is an uncommon disease in grazing livestock systems, as the primary source of precursors (carotenes) is fresh forage. However, under environmental circumstances predisposing to the development of poor-quality forage, vitamin A deficiency and associated clinical signs can occur. Thi...

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Autores principales: Pachiani, M., Livio, J.M, Cantón, German J.
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2024
Materias:
Vitamin A
Deficiency
Blindness
Cattle
Vitamina A
Deficiencia
Ceguera
Bovinos
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/7872
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-7872
record_format ojs
spelling I48-R154-article-78722024-11-01T13:19:27Z Hypovitaminosis A in two beef calves: case report in Buenos Aires province Hipovitaminosis A en terneros de cría: reporte de caso en la provincia de Buenos Aires Pachiani, M. Livio, J.M Cantón, German J. Vitamin A Deficiency Blindness Cattle Vitamina A Deficiencia Ceguera Bovinos Hypovitaminosis A is an uncommon disease in grazing livestock systems, as the primary source of precursors (carotenes) is fresh forage. However, under environmental circumstances predisposing to the development of poor-quality forage, vitamin A deficiency and associated clinical signs can occur. This article describes the clinical findings of hypovitaminosis A in two 2-months-old calves in beef herd in Ayacucho, Buenos Aires Province, in November 2023. Blindness was the only clinical sign observed in a beef herd.. Low vitamin A concentration was detected in blood of affected and non-affected calves and their mothers ranging from 7.8 to 24.8 μg dL-1 in calves and from 15.5 to 28.9 μg dL-1 in cows (reference 25-35 μg dL-1 in calves and 40-50 μg dL-1 in adults), confirming the deficiency status of the herd. During gestation, dams were fed corn-harvested hay. This diet may have been a poor source of carotene, leading to reduced hepatic reserves of vitamin A in the calves at birth. Consequently, clinical signs may have occurred during the first few weeks when these reserves were depleted. La hipovitaminosis A no es común en sistemas de producción pastoriles ya que sus principales precursores (carotenos) abundan en el forraje verde. Sin embargo, si se dan condiciones que favorezcan el desarrollo de forraje de poca calidad nutricional, se puede favorecer a la aparición de casos de deficiencia de vitamina A y la aparición de signos clínicos asociados. Este artículo describe los hallazgos clínicos de un caso de hipovitaminosis A en dos terneros de 2 meses de vida, en un rodeo para carne bovina en el partido de Ayacucho, en la provincia de Buenos Aires, en noviembre de 2023. Estos aparecieron con ceguera como único signo clínico. Se constataron bajos niveles de vitamina A en muestras de sangre de los terneros afectados como de sus compañeros (entre 7,8-24,8 μg dL-1; valores de referencia 25-35 μg dL-1), y sus madres (entre 15,5 y 28,9 μg dL-1; valores de referencia 40-50 μg dL-1), confirmando el estatus de deficiencia generalizada en el rodeo. Las madres durante la gestación estuvieron consumiendo rollos confeccionados con restos de cosecha de maíz. Esto puede haber hecho que reciban una escasa oferta de carotenos durante la gestación, y consecuentemente, los terneros nacieron con escasas reservas hepáticas, llevando a la aparición de los primeros signos clínicos cuando estas se agotaron, durante las primeras semanas de vida. Universidad Nacional del Nordeste 2024-11-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/7872 10.30972/vet.3527872 Revista Veterinaria; Vol. 35 Núm. 2 (2024); 108-110 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/7872/7394 https://creativecommons.org/licenses/by-nc/4.0
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic Vitamin A
Deficiency
Blindness
Cattle
Vitamina A
Deficiencia
Ceguera
Bovinos
spellingShingle Vitamin A
Deficiency
Blindness
Cattle
Vitamina A
Deficiencia
Ceguera
Bovinos
Pachiani, M.
Livio, J.M
Cantón, German J.
Hypovitaminosis A in two beef calves: case report in Buenos Aires province
topic_facet Vitamin A
Deficiency
Blindness
Cattle
Vitamina A
Deficiencia
Ceguera
Bovinos
author Pachiani, M.
Livio, J.M
Cantón, German J.
author_facet Pachiani, M.
Livio, J.M
Cantón, German J.
author_sort Pachiani, M.
title Hypovitaminosis A in two beef calves: case report in Buenos Aires province
title_short Hypovitaminosis A in two beef calves: case report in Buenos Aires province
title_full Hypovitaminosis A in two beef calves: case report in Buenos Aires province
title_fullStr Hypovitaminosis A in two beef calves: case report in Buenos Aires province
title_full_unstemmed Hypovitaminosis A in two beef calves: case report in Buenos Aires province
title_sort hypovitaminosis a in two beef calves: case report in buenos aires province
description Hypovitaminosis A is an uncommon disease in grazing livestock systems, as the primary source of precursors (carotenes) is fresh forage. However, under environmental circumstances predisposing to the development of poor-quality forage, vitamin A deficiency and associated clinical signs can occur. This article describes the clinical findings of hypovitaminosis A in two 2-months-old calves in beef herd in Ayacucho, Buenos Aires Province, in November 2023. Blindness was the only clinical sign observed in a beef herd.. Low vitamin A concentration was detected in blood of affected and non-affected calves and their mothers ranging from 7.8 to 24.8 μg dL-1 in calves and from 15.5 to 28.9 μg dL-1 in cows (reference 25-35 μg dL-1 in calves and 40-50 μg dL-1 in adults), confirming the deficiency status of the herd. During gestation, dams were fed corn-harvested hay. This diet may have been a poor source of carotene, leading to reduced hepatic reserves of vitamin A in the calves at birth. Consequently, clinical signs may have occurred during the first few weeks when these reserves were depleted.
publisher Universidad Nacional del Nordeste
publishDate 2024
url https://revistas.unne.edu.ar/index.php/vet/article/view/7872
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first_indexed 2025-05-17T05:10:35Z
last_indexed 2025-05-17T05:10:35Z
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