斯氏放线棒菌所致腹股沟脓肿感染

Inguinal abscess caused by Actinotignum schaalii:a case report

报告1例斯氏放线棒菌所致腹股沟脓肿感染。患者女,36岁。腹股沟出现无痛性肿物10余年。肿物逐渐变大,就诊10 d前表面破溃,局部红肿伴疼痛。皮肤科检查:右侧腹股沟一2 cm×3 cm皮下包块,皮损及周围皮肤红肿呈紫红色,皮损中央可见2处破溃,内有棕褐色液体渗出。实验室及辅助检查:脓液革兰染色显示大量白细胞和少量革兰氏阳性杆菌。厌氧条件下在富含血液的琼脂培养基上培养可见灰色菌落,过氧化氢酶反应阴性,通过16S rRNA序列分析鉴定为斯氏放线棒菌。诊断:斯氏放线棒菌致腹股沟脓肿感染。治疗:予口服阿莫西林克拉维酸钾和多西环素治疗3周后好转。

A case of inguinal abscess caused by Actinotignum schaalii is reported.A 36-year-old woman presented with a painless groin mass for 10 years.The mass gradually grew larger,and became ulcerated,with redness and pain for 10 days.Physical examination showed a subcutaneous mass,measuring 2 cm×3 cm in sizes,located in the right groin.The lesion and surrounding skin were purple to red.Two ulcers were seen in the center of the lesion,with brown,serous exudate.Gram stain of pus showed numerous leukocytes and few gram positive bacillus.Gray colonies were visible on blood enriched agar medium cultured under anaerobic conditions.The catalase test was negative.The colonies were identified as Actinotignum schaalii by 16S rRNA sequence analysis.A diagnosis of inguinal abscess caused by Actinotignum schaalii was made,and the patient recovered after 3 weeks of oral amoxicillin and doxycycline therapy.