This paper describes the clinical findings and treatment of 67 sheep and goats with listeriosis. In 55 of them the diagnosis was made on the basis of the typical signs, which included vestibular ataxia, circling, head tilt and unilateral cranial nerve deficits, but in 12 animals a definitive diagnosis was made only after postmortem examination. The most significant haematological and biochemical findings were a high haematocrit in 16 animals, a high concentration of total protein in 33, a high concentration of bilirubin in 39 and a high concentration of urea nitrogen in 28 animals. Twenty-eight of the animals had a metabolic acidosis. Thirty-nine animals were treated with antibiotics, intravenous sodium chloride and glucose solutions and sodium bicarbonate. Ten of them survived and the others were euthanased because their condition deteriorated. Of the 10 that survived, nine were able to stand when they were first examined and one was in lateral recumbency. Of 15 animals treated with chloramphenicol, one survived; of 11 animals treated with oxytetracycline, two survived; and of nine animals treated with gentamicin and ampicillin, six survived.
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