Verminous pneumonia is characterized by lesions in the lung due to parasites passing through the lung as part of their migration.
Recorded cases of verminous parasitism in cats has been reported with Aelurostrongylus spp, Capillaria aerophilia, Eucoleus aerophilus, Oslerus rostratus, Paragonimus spp and Troglostrongylus subcrenatus.
Lesions can vary from interstitial to chronic bronchitis to granulomatous pneumonia. There may be infiltration of eosinophils in pulmonary interstitium and bronchoalveolar spaces and atelectasis and emphysema may result due to obstruction.
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