Infectious anorectitis is a poorly described clinical entity. Their epidemiology is poorly known, as are their clinical, diagnostic (diagnoses are regularly made in gastroenterology and new diagnostic tools are now available) and therapeutic aspects.

The proctology center of the Marie Thérèse Center is the leading proctology center in the Ile-de-France region both in terms of recruitment and reputation, and drains a large proportion of patients with anorectitis for specialized care. The clinical microbiology laboratory of the Saint Joseph Hospital Group is linked to the Marie Thérèse Center to provide its expertise in the microbiological and infectious aspects of the management of these infections.

In recent years, the analysis of data from this large population of patients referred to the Léopold Bellan proctology center for suspected ano-rectitis has revealed the pathogens Neisseria gonorrhoeae and/or Chlamydia trachomatis.

Mycoplasma genitalium (MG) is an emerging pathogen responsible for Sexually Transmitted Infections (STI) and has been described increasingly in recent years. Studies on this pathogen will allow to better identify risk factors and to target optimized prevention and therapeutic management strategies.

Inclusion Criteria:

• Patient whose age is ≥ 18 years
• Patients treated at the Centre de proctologie of the Centre de santé Marie-Thérèse or the GHPSJ (consultation and/or hospitalization) and for whom an anorectal swab will be taken for suspected infectious sexually transmitted ano-rectitis
• French-speaking patient

Exclusion Criteria:

• Patient under guardianship or curatorship
• Patient deprived of liberty
• Patient under court protection
• Patient objecting to the use of his data for this research

- Patient whose age is ≥ 18 year, treated at the Centre de proctologie of the Centre de santé Marie-Thérèse or the GHPSJ (consultation and/or hospitalization) and for whom an anorectal swab will be taken for suspected infectious sexually transmitted ano-rectitis from June 2021.