PT - JOURNAL ARTICLE AU - Pannee Chaiphosri AU - Alisra Tattakorn AU - Kanokrat Lerdtriphop TI - P323 Unexpected rising trend of sexually transmitted infection in bangkok, thailand AID - 10.1136/sextrans-2019-sti.434 DP - 2019 Jul 01 TA - Sexually Transmitted Infections PG - A172--A172 VI - 95 IP - Suppl 1 4099 - http://sti.bmj.com/content/95/Suppl_1/A172.1.short 4100 - http://sti.bmj.com/content/95/Suppl_1/A172.1.full SO - Sex Transm Infect2019 Jul 01; 95 AB - Background Sexually transmitted infection (STI) remain a major public health challenge in Thailand, particularly Bangkok. STI control is important for HIV prevention. With a commitment to United Nation’s Fast-Track cities to end AIDS in Bangkok by 2030, situation of STI should be monitored to assess effectiveness of HIV prevention efforts. This study aimed to examine trends of STI in Bangkok from 2013 to 2017 using case reporting data and periodic surveys.Methods Data were obtained from the National Notifiable Disease Surveillance Report (506) and Routine Integrated HIV Information System (RIHIS) from nine STI clinics in Bangkok between 2013 and 2017.Results Bangkok is facing a rise in STI cases, especially among young people, with 40% of all STI cases occurring in 15–24 years. From 2013 to 2017, the rates of reported STI in Bangkok increased eight folds from 11.8 cases per 100,000 population to 90 cases per 100,000, while the national rate rose four folds (18.5 in 2013 to 67.2 in 2017). In 2017, syphilis was the most commonly reported disease in Bangkok with two times the national rate and particular common among men who have sex with men (MSM).Conclusion Prevalence of STI in Bangkok was rising and much higher than the national scale. MSM account for a disproportionately large burden of STIs particularly syphilis, which are consistent with high prevalence of HIV infection among MSM. Weakening of STI control may undermine HIV prevention efforts. Strengthening STI control in Bangkok are urgently needed.Disclosure No significant relationships.