毛真菌病,这是由机会性的黑色酵母样真菌Exophialadermatitidis引起的,在人类和狗中都有报道。然而,以前没有发表过描述猫中E.dermatitidis感染的研究。在这里,我们报告1例皮下皮氏真菌病。一个12岁的孩子,被阉割的雄性日本国内短毛猫在颈部左侧有一个孤立的皮下脓肿,之前已经放置了用于强制喂养的食管管。这只猫被诊断患有肝炎,并用泼尼松龙治疗。使用手术刀刀片切开皮下脓肿,并排出脓液。脓液的细胞学检查显示菌丝伴中性粒细胞和巨噬细胞浸润。尽管猫口服伊曲康唑或局部滴注酮康唑乳膏,它死了。脓液标本的真菌培养物呈深绿色,蜡质,光滑,酵母样菌落。脓液样本的核糖体DNA的内部转录间隔区1-4区域的测序显示与标准菌株的100%同一性。基于这些结果,这只猫被诊断为由皮肤大肠杆菌引起的皮下真菌病。抗真菌药敏试验显示真菌对所检查的抗真菌药物有低或中度敏感性,除了两性霉素B,表现出很高的体外抗真菌活性。这是首例病例报告,提供猫中E.dermatitiidis感染的明确证据以及针对临床分离的E.dermatitiidis的抗真菌药敏试验结果。
Phaeohyphomycosis, which is caused by the opportunistic black yeast-like
fungus Exophiala dermatitidis, has been reported in humans and dogs. However, no previous studies describing E. dermatitidis infections in cats have been published. Herein, we report a
case of subcutaneous phaeohyphomycosis caused by E. dermatitidis. A 12-year-old, castrated male Japanese domestic short-haired cat presented with a solitary subcutaneous abscess on the left side of the neck, where an esophageal tube for force-feeding had been placed previously. The cat was diagnosed with hepatitis and was treated with prednisolone. The subcutaneous abscess was incised using a scalpel blade and the pus was excreted. The cytology of the pus revealed hyphae with neutrophil and macrophage infiltration. Although the cat was treated with oral itraconazole or an infusion of topical ketoconazole cream applied to the lesion, it died. The fungal culture of the pus specimen developed dark-green, waxy, smooth, yeast-like colonies. Sequencing of the internal transcribed spacer 1-4 regions of the ribosomal DNA of the pus specimen showed 100% identity with that of the standard strains of E. dermatitidis. Based on these results, the cat was diagnosed with subcutaneous phaeohyphomycosis caused by E. dermatitidis. The antifungal susceptibility test revealed that the
fungus showed low or moderate susceptibility to the antifungal drugs examined, except for amphotericin B, which exhibited high in vitro antifungal activity. This is the first
case report to provide definitive evidence of E. dermatitidis infection in cats and antifungal susceptibility test results against clinically isolated E. dermatitidis.