1梅毒硬下疳的临床特征是什么其诊断价值如何梅毒是由密螺旋体引起的一种慢性性传播疾病。主要通过不洁性交或其他性行为传染,也可通过胎盘传染给下一代。通过性传染时,患者通常在性接触感染后3wk,在外生殖器如男性阴茎冠状沟及邻近部位,女性的阴唇和子宫颈上出现微红病灶,以后 What is the clinical characteristic of a syphilitic subcutis? How is it diagnosed? Syphilis is a chronic sexually transmitted disease caused by Treponema pallidum. Mainly through unclean intercourse or other sexual transmission, but also through the placenta to the next generation. Through sexually transmitted infections, the patient is usually 3wk after sexual contact with infection, in the external genitalia such as male penile coronary sulcus and adjacent parts, female labia minora and cervix appear reddish lesions, after