Intoxicação crônica por Pteridium aquilinum (L) Kuhn (Polypodiaceae) em bovinos
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Ciência Rural
Abstract
São descritos casos de neoplasias de bexiga e trato digestivo superior, seguindo à ingestão de samambaia (Pteridium aquilinum) em bovinos, diagnosticados pelo Centro de Diagnóstico Veterinário da Universidade Federal de Santa Maria, Rio Grande do Sul, durante o período de 1964-1991. Hemangiomas foram os tumores mais comumente encontrados na bexiga, levando ao aparecimento de hematúria. Carcinomas epidermóides foram encontrados no sistema digestivo superior causando sinais clínicos que variaram com o local da lesão, constatando-se dificuldade de deglutição, emagrecimento, dificuldade respiratória, tosse e timpanismo. Alguns animais apresentaram concomitantemente tumores nas duas localizações. Também ocorreram papilomas associados a tumores de bexiga e trato digestivo superior em algumas ocasiões.
Clinical cases of neoplasms of the urinary bladder and upper digestive tract related to the ingestion of bracken fern (Pteridium aquilinum) in cattle, diagnosed at the Veterinary Diagnostic Centre of the Universidade Federal de Santa Maria, Rio Grande do Sul from 1964 into 1991 are described. Haemangiomas are the more common neoplasms found in the bladder, associated with haematuria. Squamous cell carcinomas are found along the upper digestive tract inducing clinical signs related to their location, such as difficulty of swallowing, emaciation, respiratory distress, coughing and bloating. A few animals developed tumours in more than one location. Papilomas associated to the urinary bladder and upper digestive tract were also observed.
Clinical cases of neoplasms of the urinary bladder and upper digestive tract related to the ingestion of bracken fern (Pteridium aquilinum) in cattle, diagnosed at the Veterinary Diagnostic Centre of the Universidade Federal de Santa Maria, Rio Grande do Sul from 1964 into 1991 are described. Haemangiomas are the more common neoplasms found in the bladder, associated with haematuria. Squamous cell carcinomas are found along the upper digestive tract inducing clinical signs related to their location, such as difficulty of swallowing, emaciation, respiratory distress, coughing and bloating. A few animals developed tumours in more than one location. Papilomas associated to the urinary bladder and upper digestive tract were also observed.
