<prompt> Answer this question truthfullyWhich causes of painless genital ulceration result in the presence of painful inguinal lymph nodes, also known as buboes?  <response>: <reason> Chlamydia L1-L3, which is also referred to as LGV lymphogranuloma venereum, is the cause of painless genital ulceration that presents with painful inguinal lymph nodes. 