Hallazgos anatomopatológicos en equinos y mulares de la región patagónica, afectados de mal seco
SUMMARY PATHOLOGICAL FINOINGS IN HORSES ANO MULES WITH "MAL SECO", A GRASS SICKNESS-LIKE SYNOROME, IN PATAGONIA REGION, ARGENTINA- Mal seco is a disease that affects horses and mules grazing in the Patagonia region of Argentina. Seven horses and two mules were necropsied and histopathological studies carried out. The digestive tract presented the most striking findings. The stomach was distended with a fetid. greenish fluid. The large colon. and in some cases the caecum. were dilated by a large amount of dry. impacted, acid smelling. dark-coated contents, resembling a stack of coins. Foca' necrosis of the epithelium with bacterial colonization was consistently found in oesophagus, stomach, small intestine and large intestine. Loss of basophilia. margination of nuclei and a rounded outline to the neuronal body was observed in neurones of the ventral horn of the spinal cord. Slight demyelination was also observed in the spinal cord. The information gained in this study compared with that reported previously by the authors. provide support to the suggestion that Mal seco and Grass sickness are similar diseases.
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