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Uma doença respiratória foi diagnosticada em cinco dentre 23 bovinos (21,7%) após terem sido alimentados com batata-doce (Ipomoea batatas) mofada em uma pequena propriedade rural em São Vicente do Sul, Rio Grande do Sul, Brasil. Três dos cinco bovinos afetados morreram espontaneamente, e o quarto foi sacrificado para necropsia quando mostrava sinais clínicos respiratórios avançados. A manifestação clínica iniciara cerca de 24 horas após a ingestão das batatas-doces e a evolução clínica foi de 1 a 4 dias. Os sinais clínicos incluíam dispnéia (respiração laboriosa e abdominal), taquipnéia, pescoço estendido com cabeça baixa e dilatação ritmada das narinas. Dois bovinos foram necropsiados. Os achados de necropsia incluíam pulmões distendidos, pálidos e de consistência borrachenta, que não colapsavam quando o tórax era aberto; enfisema e edema acentuados eram evidentes no pulmão. Os linfonodos e o baço apresentavam alterações características de hiperplasia linfóide. Histologica-mente, as lesões eram típicas de pneumonia intersticial. Os septos alveolares estavam espessados por fibroblastos e células inflamatórias, havia hipertrofia e hiperplasia de pneumócitos tipo II; os septos interlobulares estavam distendidos por edema e enfisema. A cultura de amostras das batatas-doces mofadas produziu Fusarium solani e F. oxysporum. Cases of respiratory disease were diagnosed in five out of 23 cattle (21.7%) after they were fed moldy damaged sweet potatoes (Ipomoea batatas) on a small farm in the county of São Vicente do Sul, state of Rio Grande do Sul, Brazil. Of those five cattle, three died spontaneously and another one was euthanatized for necropsy while showing advanced respiratory clinical signs. The disease manifested itself approximately 24 hours after the ingestion of the sweet potatoes and lasted from 1 to 4 days. Clinical signs included dyspnea (labored breathing and abdominal respiration), tachypnea, extended neck with low carriage of the head and rhythmical flaring of the nostrils. Two cows were necropsied. Necropsy findings included distended pale and rubbery lungs which failed to collapse when the thorax was open, and marked pulmonary interstitial emphysema and edema. Lymphoid hyperplasia was observed in the hilar nodes and spleen. Histologically, the lesions were those of interstitial pneumonia. Alveolar septa were thickened by fibroblasts and inflammatory cells, and there was hypertrophy and hyperplasia of type II pneumocytes; the interlobular septa were distended by edema and emphysema. The culture of the moldy sweet potatoes yielded Fusarium solani and Fusarium oxysporum

Pneumonia intersticial em bovinos associada à ingestão de batata-doce (Ipomoea batatas) mofada