Lymphogranuloma venereum (LGV), also known as lymphopathia venerea, tropical bubo, climatic bubo, strumous bubo, poraenitis inguinales, Durand-Nicolas-Favre disease and lymphogranuloma inguinale, is a sexually transmitted disease caused by the invasive serovars L1, L2, or L3 of Chlamydia trachomatis.