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Peer-reviewed veterinary case report

Yeast infection in aspiration pneumonia in a dog with megaesophagus

By Kornya, Matthew et al.·Published in The Canadian veterinary journal = La revue veterinaire canadienne·2026·Department of Clinical Studies, Canada·View original on PubMed

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Original publication title: as a component of aspiration pneumonia in a dog with megaesophagus.

Species:
dog

Plain-English summary

An 11-year-old spayed female Dogo Argentino was brought in for breathing problems due to aspiration pneumonia, which can happen when food or liquid enters the lungs. She had a history of megaesophagus, a condition that makes it hard for dogs to swallow properly. Despite being treated with medications for 2.5 weeks, her condition worsened, and tests showed a severe infection caused by yeast. Unfortunately, she did not recover and was euthanized. This case highlights that yeast infections can complicate pneumonia in dogs, especially those on certain medications.

People also search for: dog breathing problems · aspiration pneumonia treatment in dogs · megaesophagus in dogs

Abstract

is a yeast that is a commensal of mucosal surfaces and can cause opportunistic infection in several species. Unlike otherspecies, it is commonly resistant to azoles.pneumonia has been reported in humans, with unclear prevalence, but is very rare in dogs. This report describes an 11-year-old spayed female Dogo Argentino dog with megaesophagus that was managed with mechanical ventilation for aspiration pneumonia. The dog had been treated previously with omeprazole and amoxicillin-clavulanic acid for 2.5 wk. Airway cytology showed inflammation and numerous yeast organisms most consistent with. Therapy with fluconazole was initiated, but the dog's condition deteriorated and it was euthanized.and polymicrobial infection were identified on airway culture and postmortem culture of lung tissue. Histologic examination of the lungs showed severe pneumonia with yeast organisms present within macrophages, consistent with infection. Key clinical message:should be considered as a possible contributing agent in dogs with aspiration pneumonia, especially those treated with antimicrobials and gastroprotectants.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41716509/