Peer-reviewed veterinary case report
Antifungal sensitivity of yeast from dog ear infections in Chile
By Núñez, Andrea H et al.·Published in Open veterinary journal·2022·Escuela de Medicina Veterinaria·View original on PubMed →
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Original publication title: Antifungal susceptibility ofisolated from the external auditive conduct from dogs, in central Chile.
- Species:
- dog
Plain-English summary
A group of dogs with ear infections (external otitis) had samples taken from their ears to check for a common yeast that can cause these issues. The study found that this yeast was present in 66.7% of the dogs, especially in those with infections. Most antifungal medications worked well against the yeast, but 55% of the strains were resistant to Caspofungin, which is typically used in humans. This information can help veterinarians choose the right treatment for dogs suffering from ear infections.
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Abstract
BACKGROUND: External otitis is common in dogs, and one of the main agents involved is, a yeast belonging to the otic microbiota. Empirical treatment can fail; therefore, it is essential to know the antifungal susceptibility profile to prescribe appropriate treatment, a fact scarcely reported in Chile. AIM: This study aimed to determine the antifungal sensitivity ofisolated from the external auditory canal of dogs in central Chile. METHODS: Ear swabs from 30 dogs (15 healthy and 15 with external otitis) were used. Samples were subjected to cytology and fungal culture. The antifungal susceptibility was determined according to clinical and laboratory standards institute (CLSI) document M44A-2 using the disk diffusion test from amphotericin B, Caspofungin, fluconazole, nystatin, clotrimazole, and voriconazole were used. RESULTS: The prevalence ofwas 66.7% from 8 healthy dogs and 12 with otitis. While fungal culture was not associated with the patient's clinical condition (= 0.24), the yeast count by cytology was significantly higher in dogs with otitis (= 0.003). The strains were sensitive to all antifungals except for Caspofungin, where 55% of the strains were resistant. CONCLUSION: is isolated more frequently in dogs with otitis, and the ear cytological examination is useful to differentiate colonized dogs versus dogs with otitis. In addition, most antifungalsare active against this yeast, except Caspofungin, an antifungal used in human medicine. This situation should be further monitored in epidemiological programs to evaluate the possible impact on Chilean public health.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/35342729/