Natural and Experimental Salmonella arizonae 18:z4,z32 (Ar. 7:1,7,8) Infection in Broilers. Bacteriological and Histopathological Survey of Eye and Brain Lesions

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Abstract
Arizonosis occurred in a flock of 10,000 broilers in Sao Paulo, Brazil. Among 45 specimens submitted for examination at 15 days of age, there was blindness and nervous symptoms with ataxia, torticollis and opisthotonos. Necropsy showed caseous material in the vitreous body of the eyeballs and in the cortical region of the brain; S. arizonae 18:z4,z32 (Ar. 7:1,7,8) was isolated. Ocular and brain lesions were reproduced by exposure of day old chicks to the isolate by oral and intraocular dosage, by pen contact and by i.p. injection. Lesions in the brain were most prominent in the ventricles and consisted of necrotic masses containing eosinophilic cells surrounded by macrophages and epithelioid and multinucleated cells. Lesions of the eye were most often related to the retina.

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