Surveillance report Lymphogranuloma venereum - Annual Epidemiological Report for 2016 16 Jul 2018 Lymphogranuloma venereum (LGV) is a systemic STI caused by Chlamydia trachomatis serovars L1, L2, or L3. In 2016, 2 043 cases of LGV were reported in 22 countries. Lymphogranuloma venereum - Annual Epidemiological Report for 2016 - EN - [PDF-372.3 KB]