Abstract：
BACKGROUND: A decreasing trend in tinea cruris caused by Epidermophyton floccosum, an anthropophilic dermatophyte, has been observed.
METHODS: This retrospective study involved Thai naval cadets aged 18 years or older with suspected groin lesions. Both clinical evaluations and laboratory investigations were conducted.
RESULTS: In total, 86 male participants with a median age of 19 years who presented with groin rash were enrolled in the study. Branching septate hyphae from KOH examination were found in 55 patients (64.0 %). Fungal identifications were Epidermophyton floccosum (42 cases; 76.4 %), Trichophyton mentagrophytes complex (3 cases; 5.5 %), and no growth (10 cases; 18.2 %). An E. floccosum outbreak was identified, with a prevalence of 76.4 %. Most lesions exhibited admixed erythema and hyperpigmentation. Approximately two-thirds displayed prominent, easily visible scaling. Scrotal involvement was absent in 95.2 % of lesions, with 87.2 % presenting bilaterally. A gradual symptom onset lasting up to 2 months was observed in 78.9 % of cases. Lesion morphologies included annular (73.8 %), patchy (14.3 %), and polycyclic (9.5 %). Severe itching disrupting daily activities was reported by only 7.1 % of participants. Approximately two-thirds used over-the-counter (OTC) topical medications without consulting a physician. Risk factors related to clothing included sharing clothes (59.5 %), wearing sweaty clothes (100 %), and reusing unwashed clothes (81.0 %).
CONCLUSIONS: The E. floccosum tinea cruris outbreak among naval cadets was characterized by a gradual onset and mild symptoms. OTC medication use without physician consultation was prevalent.
METHODS: This retrospective study involved Thai naval cadets aged 18 years or older with suspected groin lesions. Both clinical evaluations and laboratory investigations were conducted.
RESULTS: In total, 86 male participants with a median age of 19 years who presented with groin rash were enrolled in the study. Branching septate hyphae from KOH examination were found in 55 patients (64.0 %). Fungal identifications were Epidermophyton floccosum (42 cases; 76.4 %), Trichophyton mentagrophytes complex (3 cases; 5.5 %), and no growth (10 cases; 18.2 %). An E. floccosum outbreak was identified, with a prevalence of 76.4 %. Most lesions exhibited admixed erythema and hyperpigmentation. Approximately two-thirds displayed prominent, easily visible scaling. Scrotal involvement was absent in 95.2 % of lesions, with 87.2 % presenting bilaterally. A gradual symptom onset lasting up to 2 months was observed in 78.9 % of cases. Lesion morphologies included annular (73.8 %), patchy (14.3 %), and polycyclic (9.5 %). Severe itching disrupting daily activities was reported by only 7.1 % of participants. Approximately two-thirds used over-the-counter (OTC) topical medications without consulting a physician. Risk factors related to clothing included sharing clothes (59.5 %), wearing sweaty clothes (100 %), and reusing unwashed clothes (81.0 %).
CONCLUSIONS: The E. floccosum tinea cruris outbreak among naval cadets was characterized by a gradual onset and mild symptoms. OTC medication use without physician consultation was prevalent.
摘要：
背景：由絮状表皮苔癣引起的股癣呈减少趋势，一种嗜人性皮肤癣菌，已被观察到。
方法：这项回顾性研究涉及年龄在18岁或以上的疑似腹股沟病变的泰国海军学员。进行了临床评估和实验室调查。
结果：总计，86名男性参与者，中位年龄19岁，出现腹股沟皮疹被纳入研究。在55例患者（64.0％）中发现了KOH检查的分支间隔菌丝。真菌鉴定为絮状表皮苔藓（42例；76.4%），毛癣菌植生复合体（3例；5.5％），无增长(10例；18.2%)。确定了一个絮状大肠杆菌爆发，患病率为76.4%。大多数病变表现为混合红斑和色素沉着。大约三分之二的人表现突出，很容易看到缩放。95.2%的病变没有阴囊受累，87.2%的人出现在双边。在78.9％的病例中观察到持续2个月的逐渐症状发作。病变形态包括环状（73.8%），斑驳（14.3%），和多环(9.5%)。只有7.1％的参与者报告了严重的瘙痒破坏了日常活动。大约三分之二的人在没有咨询医生的情况下使用了非处方药(OTC)。与服装相关的风险因素包括共享服装（59.5%），穿着出汗的衣服（100％），和重复使用未清洗的衣服(81.0%)。
结论：海军学员中的毛癣E.flocosum癣爆发的特征是逐渐发作和轻度症状。没有医生咨询的OTC药物使用很普遍。
方法：这项回顾性研究涉及年龄在18岁或以上的疑似腹股沟病变的泰国海军学员。进行了临床评估和实验室调查。
结果：总计，86名男性参与者，中位年龄19岁，出现腹股沟皮疹被纳入研究。在55例患者（64.0％）中发现了KOH检查的分支间隔菌丝。真菌鉴定为絮状表皮苔藓（42例；76.4%），毛癣菌植生复合体（3例；5.5％），无增长(10例；18.2%)。确定了一个絮状大肠杆菌爆发，患病率为76.4%。大多数病变表现为混合红斑和色素沉着。大约三分之二的人表现突出，很容易看到缩放。95.2%的病变没有阴囊受累，87.2%的人出现在双边。在78.9％的病例中观察到持续2个月的逐渐症状发作。病变形态包括环状（73.8%），斑驳（14.3%），和多环(9.5%)。只有7.1％的参与者报告了严重的瘙痒破坏了日常活动。大约三分之二的人在没有咨询医生的情况下使用了非处方药(OTC)。与服装相关的风险因素包括共享服装（59.5%），穿着出汗的衣服（100％），和重复使用未清洗的衣服(81.0%)。
结论：海军学员中的毛癣E.flocosum癣爆发的特征是逐渐发作和轻度症状。没有医生咨询的OTC药物使用很普遍。
