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Bócio congênito em caprinos no Noroeste do Rio Grande do Sul, Brasil

Os aspectos epidemiológicos, clínicos e anatomopatológicos de um surto de bócio congênito em caprinos são descritos. A etiologia dessa condição foi associada à ausência de suplementação mineral com iodo para as cabras prenhes, e constituiu o fator responsável pela natimortalidade nesse surto. Clinic...

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Published in:Ciência rural 2014-12, Vol.44 (12), p.2217-2220
Main Authors: Panziera, Welden, Kowalski, Ananda Paula, Galiza, Glauco José Nogueira de, Bianchi, Ronaldo Michel, Espíndola, Julia Pires, Cardoso, Maurício Machado, Vargas, Agueda Castagna de, Fighera, Rafael Almeida
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container_issue 12
container_start_page 2217
container_title Ciência rural
container_volume 44
creator Panziera, Welden
Kowalski, Ananda Paula
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Fighera, Rafael Almeida
description Os aspectos epidemiológicos, clínicos e anatomopatológicos de um surto de bócio congênito em caprinos são descritos. A etiologia dessa condição foi associada à ausência de suplementação mineral com iodo para as cabras prenhes, e constituiu o fator responsável pela natimortalidade nesse surto. Clinicamente, todos os natimortos apresentaram marcado aumento de volume na região cervical ventral cranial e alopecia difusa. Na necropsia de um dos cabritos natimortos, observou-se acentuado aumento de volume simétrico de ambos os lobos da glândula tireoide, que eram firmes, compactos e vermelho-escuros. Histologicamente, as lesões eram características de bócio hiperplásico difuso e consistiam de: 1) marcada hiperplasia e hipertrofia do epitélio folicular; 2) formação de folículos tireoidianos marcadamente heterogêneos, devido principalmente à quantidade variável de coloide intraluminal; e 3) presença de vacúolos endocíticos, que representam a endocitose do coloide e demonstram a atividade da glândula tireoide The epidemiological, clinical, and anatomopathological aspects of an outbreak of congenital caprine goiter are described in this article. The cause of the congenital goiter and neonatal deaths was attributed to the absence of mineral supplementation with iodine to the pregnant dams. Clinically, all neonatal dead goats presented with marked swelling on the cranioventral cervical area and diffuse body alopecia. One of the dead kids was submitted to necropsy, and changes consisted of marked, symmetrical enlargement of both thyroid lobes, which were also firm, compact, and dark red. Histologically, changes were characteristic of diffuse hyperplastic goiter and consisted of: 1) marked follicular thyroid hyperplasia and hypertrophy; 2) formation of heterogeneous thyroid follicles due to the variable amounts of luminal colloid; and 3) presence of endocytic vacuoles, which represent colloid endocytosis and demonstrate activity of the thyroid gland
doi_str_mv 10.1590/0103-8478cr20140413
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