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- Title
Hypersensitivity pneumonitis associated with inhalation of Lycoperdon spores (lycoperdonosis) in a 3-month-old English setter dog in Quebec.
- Authors
Lécuyer, Sandrine; Auffret, Vincent; Corrales Mesa, Cindy L.; Bédard, Christian; Martin, Édouard; Duval, Valérie; Letendre, Jo-Annie; Finck, Cyrielle
- Abstract
A 3-month-old female English setter dog was presented to the Faculty of Veterinary Medicine of the Université de Montréal (Quebec) with acute respiratory distress. The dog had moderately increased C-reactive protein concentrations, and thoracic radiographs revealed a moderate, caudodorsal, nodular-to-miliary alveolo-interstitial pulmonary pattern that was worse in the perihilar region. Initial differential diagnoses included a fungal pneumonia (e.g., blastomycosis or histoplasmosis). Cytology of the bronchoalveolar lavage revealed several round, green structures -2 µm in diameter, consistent with fungal spores. The dog was hospitalized, but within 24 h the respiratory condition deteriorated and euthanasia was elected. Post-mortem panfungal PCR and sequencing tests identified the spores as Lycoperdon sp. Retrospectively, the owners recalled that the dog had played in a wood pile with mushrooms and had sneezed in a cloud of spores, implying inhalation of Lycoperdon spores. This is the first report of a confirmed case of canine lycoperdonosis in eastern Canada (Quebec), and the radiographic features in this case differed slightly from previous reports. Diagnosis before bronchoalveolar lavage analysis was challenging, as spore inhalation was not initially reported. Although the disease is infrequently reported in dogs, this case report reminds veterinarians to consider lycoperdonosis as a differential diagnosis when addressing animals presented with acute dyspnea with similar radiographic lesions, and highlights the importance of history and cytology in diagnosing this condition.
- Subjects
QUEBEC (Quebec); HYPERSENSITIVITY pneumonitis; DOGS; UNIVERSITE de Montreal; SPORES; DIAGNOSTIC use of polymerase chain reaction; FUNGAL spores; VETERINARY medicine
- Publication
Canadian Veterinary Journal / Revue Vétérinaire Canadienne, 2024, Vol 65, Issue 6, p559
- ISSN
0008-5286
- Publication type
Case Study