The Health Protection Surveillance Centre (HPSC) is responsible for the collation of data on STIs in Ireland.  The data below is taken from the latest HPSC report, ‘Sexually Transmitted Infections (STIs) in Ireland, 2016’ published on 21st December 2017.  Reports can be accessed at

STI Notifications 2016 – Ireland

There were 12,984 STI notifications in Ireland in 2016, an increase of 3% compared to 2015.

The burden of STIs remains greatest among those aged 15 to 24 years and men who have sex with men.

Type of STI Notifications:

  • Chlamydia was the most commonly notified STI in Ireland with 6,893 notifications in 2016.
  • There were 1,593 notifications of Ano-Genital warts in 2016.
  • The notification rate for Gonorrhoea increased by 51% to 41.1 per 100,000 population compared to 27.2 per 100,000 population in 2015.
  • 1,369 cases of herpes simplex (genital) were notified in 2016.
  • There were 305 early infectious syphilis notified, 48 cases of Lymphogranuloma venereum (LGV), 740 Non-specific urethritis and 79 Trichomoniasis diagnoses reported in 2016..


STIs and Young people

  • 86% of all STIs notified in 2016 were among those aged less than 30 years
  • 15-24 year olds accounted for almost half of chlamydia cases, 43% of herpes simplex cases and 37% of gonorrhoea cases notified in 2016

STIs and MSM (men who have sex with men)

  • MSM represent 100% of LGV cases and 88% of early infectious syphilis cases notified in 2016.
  • 63% of gonorrhoea cases in 2016 were in MSM (where mode of transmission was known).