Intoxicação experimental pelas favas de Stryphnodendron obovatum (Leg. Mimosoideae) em bovinos. 2. Achados anátomo e histopatológicos

Pesquisa Veterinária Brasileira

Marilene F. Brito²  Carlos H. Tokarnia¹  Paulo V. Peixoto¹ 

[1] ,Universidade Federal Rural do Rio de Janeiro Setor de Anatomia Patológica Departamento Epidemiologia e Saúde PúblicaSeropédica RJ

关键词: Poisonous plants;    experimental plant poisoning;    Stryphnodendron obovatum;    cattle;    pathology;    Plantas tóxicas;    intoxicação experimental por plantas;    Stryphnodendron obovatum;    bovinos;    patologia;   

DOI  :  10.1590/S0100-736X2001000200004

来源: SciELO

【 摘 要 】

With the objective to characterize the gross and histopathological changes of poisoning by the tree Stryphnodendron obovatum Benth., of the Leguminosae Mimosoideae family, its pods were given orally to 17 young bovines. Five of the animals died from the poisoning. One of them received one dose of 60g/kg, and four animals repeated doses(10g/kg for 8 days, 20g/kg for 3 days, 30g/kg for 2 days, and 40g/kg also during 2 days). At post-mortem examination there was reddening and adherence of the mucosal papillae, breaking up of the epithelium and congestion of the propria, mainly in the rumen and with less intensity in the reticulum and omasum. In the abomasum, focal and diffuse congestion of the mucosa, large areas of erosion and ulceration were observed. In the small intestine there was congestion of the mucosa, and the Peyer's plaques were red and well defined. In the large intestine slight to moderate congestion was seen. The mesenteric lymph nodes were reddend on the cut surface. Histological examination showed in the epithelium, from the oral cavity on up to the omasum, areas of acanthosis, spongiosis, parakeratosis, hyperkeratosis, necrosis and hydropic-vacuolar degeneration, with formation of intraepithelial vesicles or pustules, sometimes containing acantholytic keratocytes, and splitting of the epithelial layer in these areas. In the entire digestive tract, focal congestion and hemorrhages were observed, more severely in the abomasum and small intestine.

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