Sexual Health

Oropharyngeal gonorrhoea infections among young heterosexual users of online sexual health services across the island of Ireland.

TL;DR

Oropharyngeal gonorrhoea was detected in 92% of gonorrhoea cases among young heterosexuals using an online self-sampling service, with 63% of cases occurring as single-site oropharyngeal infections that would have been missed by urogenital-only testing protocols.

Key Findings

Oropharyngeal gonorrhoea was detected in 92% of all gonorrhoea cases among young heterosexual self-sampling individuals.

  • 208 out of 226 total gonorrhoea cases were oropharyngeal positive
  • Study period: November 2023 to March 2024
  • Participants were heterosexual individuals aged 17-24 years across the island of Ireland
  • The online postal self-sampling service SH:24 expanded gonorrhoea nucleic acid amplification testing to include oropharyngeal swabs for this population

Oropharyngeal gonorrhoea positivity was 2.9% of the tested population.

  • 208 oropharyngeal gonorrhoea cases detected out of the tested population
  • Island-of-Ireland weighted positivity: 2.9% (95% CI 2.6 to 3.4)
  • Overall NG positivity across all anatomical sites was 3.2% (226/7009; 95% CI 2.8 to 3.7)
  • Of 12,011 individuals who requested a self-sampling kit, 7,036 (58.6%) returned both oropharyngeal and genital swabs suitable for analysis, with valid results available for 7,009 individuals

The majority of oropharyngeal gonorrhoea cases (63%) occurred as single-site infections without concurrent genital infection.

  • 143 out of 226 gonorrhoea cases were single-site oropharyngeal infections
  • Single-site oropharyngeal positivity was 1.9% (95% CI 1.7 to 2.4) of the tested population
  • These cases would have been missed by testing protocols limited to urogenital sites
  • Genital-only infections occurred in only 8% (18/226) of cases

Concurrent oral and genital (multisite) gonorrhoea infections were identified in 29% of cases.

  • 65 out of 226 gonorrhoea cases had both oropharyngeal and genital infections
  • Multisite infections represented 29% of all gonorrhoea cases detected
  • This finding further supports the oropharynx as a common and co-occurring infection site in this population

The study suggests the oropharynx acts as a common and often independent gonorrhoea infection site among young heterosexuals, with implications for current testing guidelines.

  • The authors state findings 'suggest a potential risk for onward transmission'
  • Authors call for 'a review of testing guidelines in this population'
  • Authors also call for 'further research to better understand behavioural risk factors associated with OPNG positivity'
  • The hypothesis that the oropharynx acts as a reservoir for gonorrhoea was supported by these findings

What This Means

This research suggests that gonorrhoea infections in the throat (oropharyngeal gonorrhoea) are surprisingly common among young heterosexual people, based on a study of over 7,000 individuals aged 17-24 in Ireland and Northern Ireland who used an online home-testing service. Nearly 3% of those tested had a throat gonorrhoea infection, and remarkably, 92% of all gonorrhoea cases detected involved the throat. Most strikingly, 63% of throat infections occurred without any genital infection at the same time — meaning these cases involved only the throat. This matters because standard gonorrhoea testing in heterosexual people typically focuses only on genital sites. This research suggests that if throat testing is not included, the large majority of throat infections in this group would go completely undetected and untreated. Undetected infections could potentially allow the bacteria to spread further within sexual networks. The findings raise important questions about current sexual health testing guidelines, which generally do not recommend routine throat swabs for heterosexual individuals. The authors suggest that guidelines may need to be reviewed for young heterosexual people, and that more research is needed to understand what sexual behaviors are associated with throat gonorrhoea in this population.

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Citation

Harrison A, Harbottle J, Campbell M, O'Donnell K, Perry M, Sykes A, et al.. (2025). Oropharyngeal gonorrhoea infections among young heterosexual users of online sexual health services across the island of Ireland.. Sexually transmitted infections. https://doi.org/10.1136/sextrans-2025-056487