Julia McCarthy

Phaeohyphomycosis is an opportunistic mycosis caused by dematiaceous fungi, typically affecting the cutaneous or subcutaneous tissues of the facial region and distal extremities in cats. This report documents a case of Cladophialophora boppii infection in a cat. A 7-year-old neutered male domestic shorthair cat was presented with a chronic, pigmented nasal lesion, non-productive sneezing, and stertor. Computed tomography, rhinoscopy, and tissue sampling were performed. Fungal culture and molecular sequencing confirmed the diagnosis. Oral itraconazole treatment failed to arrest progression, necessitating delayed nasal planectomy. Despite transient remission, disease recurred, requiring repeat surgical debridement, and prolonged antifungal treatment. Clinical resolution was ultimately achieved, with marked improvement in the cat’s quality of life. Identification of a novel species of phaeohyphomycosis in a cat emphasizes the need for increased awareness of emerging fungal pathogens that can precipitate considerable morbidity, particularly in the absence of prompt aggressive intervention.

Background: Canine monocytic ehrlichiosis, caused by Ehrlichia canis , is a tick-borne disease of dogs. We report the first confirmed case of endemic Ehrlichia canis infection in a dog from Ireland, with no travel history. Case presentation: A six-year-old female neutered lurcher, presented with chronic fever, lethargy, polyuria, polydipsia, weight loss, thrombocytopenia, non-regenerative anaemia, hyperglobulinaemia, proteinuria, and ocular abnormalities including chorioretinitis and partial retinal detachment. Diagnosis was confirmed by enzyme-linked immunosorbent assays, indirect fluorescent antibody, and polymerase chain reactions. Treatment consisting of doxycycline with systemic corticosteroids resulted in resolution of associated clinical and clinicopathological abnormalities. Conclusions: This case underscores the importance of comprehensive diagnostics, tick surveillance, and a One Health approach to identify, prevent, and manage vector-borne pathogens in Ireland. The presence of potentially endemic Ehrlichia canis in this dog raises concern for local transmission, potentially via Rhipicephalus sanguineus tick.