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Prior Neisseria meningitidis (Nm) proctitis does not prevent Neisseria gonorrhoeae (Ng) proctitis among men who have sex with men (MSM)
  1. Angelo Roberto Raccagni1,
  2. Elena Bruzzesi1,
  3. Benedetta Trentacapilli1,
  4. Maria Francesca Lucente1,
  5. Antonella Castagna1,2,
  6. Silvia Nozza1,2
  1. 1 Infectious Diseases Unit, Vita-Salute San Raffaele University, Milan, Italy
  2. 2 Infectious Diseases Unit, San Raffaele Hospital, Milan, Italy
  1. Correspondence to Dr Angelo Roberto Raccagni, Vita-Salute San Raffaele University, Milan 20132, Italy; raccagni.angelo{at}

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Neisseria meningitidis (Nm) and Neisseria gonorrhoeae (Ng) show extensive similarities raising the possibility of immunological cross-protection. Clinical data are not consistent and appear to vary by site. Urethral infection with Nm was not found to lower the incidence of subsequent urethral Ng.1 However, a negative association between pharyngeal Nm and pharyngeal Ng has been reported.2 We describe the occurrence of Nm and Ng proctitis in a cohort of men who have sex with men comprising either pre-exposure prophylaxis users or people living with HIV. Among …

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  • Handling editor Anna Maria Geretti

  • Contributors ARR contributed to the writing of the article, performed medical visits and data collection. EB contributed to the writing of the article and data collection. BT contributed to data collection and the reviewing of literature. MFL contributed to the reviewing of the article. SN performed medical visits and contributed to the reviewing of the article. AC coordinated clinical activities and contributed to the reviewing of the article.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; internally peer reviewed.