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Peer-reviewed veterinary case report

Cat with chronic cough and trouble breathing - what to know about

By Kaur, Jaspreet et al.·Published in Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·2026·Department of Population Medicine and Diagnostic Sciences, United States·View original on PubMed

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Original publication title: Nodular pyogranulomatous pneumonia associated withinfection in a cat.

Species:
cat

Plain-English summary

A 1-year-old male domestic shorthair cat was brought to the vet due to a month-long history of chronic coughing, difficulty breathing, and extreme tiredness, which worsened to the point where he stopped eating. X-rays showed that parts of his lungs were solid instead of clear, indicating a serious issue. Tests revealed that he had a type of pneumonia caused by protozoal organisms, which had not been previously reported in cats. Unfortunately, despite the vet's efforts, the cat was euthanized due to the severity of his condition.

People also search for: cat coughing and lethargy · cat pneumonia treatment · why is my cat not eating and coughing

Abstract

A 1-y-old, castrated male domestic shorthair cat was evaluated because of a 1-mo history of chronic cough, dyspnea, and lethargy that progressed to anorexia during the week preceding euthanasia. Radiographically, the right caudal and middle lung lobes were consolidated. Cytologic and histologic examination of the right caudal lung lobe revealed pyogranulomatous inflammation with intralesional protozoal organisms. Although morphologically similar to and immunohistochemically reactive for, the organisms had inconsistent features, such as variability in shape and size. WithPCR assays for the 18S DNA and the ITS1 DNA markers and Sanger sequencing, we identified the organisms as. A comprehensive search of PubMed and Google Scholar revealed no prior reports, suggesting that feline pneumonia has not been reported previously in association withinfection.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41782300/