As partes aéreas de Indigofera suffruticosa Mill. (família Leg. Papilionoideae), planta incriminada pelos criadores de diversas áreas do Nordeste por doença caracterizada por hemoglobinúria em bovinos, foram administradas por via oral a seis bovinos, em doses diárias repetidas de 10 a 40 g/kg, Todos os animais experimentais apresentaram hemoglobinúria, porém passageira, apesar continuidade da administração da planta. Dois desses bovinos não apresentaram manifestações adicionais, um terceiro animal evidenciou manifestações leves, e os três outros, sintomas adicionais de intensidade moderada: apatia, mucosas visíveis de coloração esbranquiçada, pêlos arrepiados, anorexia, diminuição da freqüência e intensidade dos movimentos ruminais, taquicardia, pulso venoso positivo e dispnéia. Antes da crise hemolítica a urina apresentava coloração verde azulada. Nenhum animal experimental morreu, porém um foi sacrificado durante a fase hemoglobinúrica. À necropsia observaram-se anemia, bexiga contendo urina cor de vinho tinto, rins aumentados de volume com coloração marrom-escura, fígado, na superfície e ao corte, de coloração azulada com lobulação perceptível. As principais alterações histológicas foram verificadas no fígado, sob forma de necrose coagulativa e tumefação e/ou microvacuolização citoplasmática dos hepatócitos, e no rim representadas por acentuada nefrose, associada a grande quantidade de filtrado e/ou hemoglobina nos espaços de Bowman dentro de túbulos e do citoplasma das células epiteliais.
Toxicological, clinic-pathological and ultrastructural aspects of iatrogenic and experimental subcutaneous poisoning in rabbits by vitamin D are described. Clinically the animals showed signs of cardiovascular insufficiency, as ascite and lung edema, hyporexia, anorexia, mucous diarrhoea, loss of weight and apathy. The classical alterations of mineralization and, occasionally, ossification of the cardiovascular system, as well the lesions of kidneys, lungs, stomach, among other organs, were reproduced by the subcutaneous administration of an oily solution of cholecalciferol (non-activated vitamin D3).
Outbreaks of infection of swine with Lawsonia intracelullaris in the state of Rio de Janeiro are described. The symptomathology was characterized by bloody diarrhea with peracute course. Postmortem findings were pale organs and tissues, reticulate aspect of the ileum with its mucosa moderately thickened nad contained large amounts of partially coagulated blood. Histopathological examination revealed hyperplastic epithelial cell proliferation of the Lieberkühn crypts, sometimes associated with inflammatory and necrotic alterations. Immunohistochemistry demonstrated the presence of large amounts of bacteria in the cytoplasm of the cryptal epithelial cells. L. intracellularis was also seen by ultramicroscopic examination. These outbreaks occurred in 1987 and this is the first report of the disease in the state of Rio de Janeiro.INDEX TERMS: Lawsonia intracellularis, Proliferative Haemorrhagic Enteropathy, swine, Rio de Janeiro.
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