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The pituitary abscess syndrome occurs more frequently in ruminants than in other species. This disease is characterized by the formation of abscesses in the vascular complex on the basal sphenoid bone, which can, by extension, affect the pituitary or neighboring structures. Clinical signs can be varied and associated with pairs of cranial nerves. The present study aimed to describe the clinical and pathological aspects of a Guzolando bovine with a pituitary abscess by Escherichia coli. A female bovine, approximately two years old, of the Guzolando breed, was attended with pedaling movements, opstotonous and white foamy liquid coming out through the nostrils. At necropsy, an increase in the volume of the pituitary region containing yellow-greenish secretion was observed, and in the culture of the secretion, growth of E. coli was observed. The diagnosis of the pituitary abscess was based on macroscopic changes and the culture and identification of the bacteria. There are no effective control measures. It is suggested that the properties that breed cattle have adequate management measures to minimize the risks of the disease occurring.

Abscesso de pituitária por Escherichia coli em um bovino