淋病是四大可以治愈的性传播疾病之一，另外三种是衣原体传染、梅毒和软性下疳。
Gonorrhea is one of four major sexually transmitted infections that can be cured . The other three are chlamydial infection , syphilis and chancroid .
软性下疳的溃疡没有传染性。
The ulcers of chancroid are not contagious .
软性下疳由病毒所引起。
Chancroid is caused by a virus .
软性下疳