Two of five bobcats (Felis rufus) from southwestern Arkansas had natural pulmonary infections of Paragonimus kellicotti and Filaroides rostratus. Pairs of P. kellicotti were found in spherical cyst-like structures approximately 1 cm in diameter. Filaroides rostratus were seen as serpentine pale white areas on the pleural surface and also firmly embedded in fibrous capsules in the pulmonary parenchyma. Histologic lesions associated with the presence of these parasites consisted primarily of a verminous bronchitis. Clinical signs or compromised pulmonary function were not associated with these infections.
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