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Neisseria meningitidis , typically a resident of the oro- or nasopharynx and the causative agent of meningococcal meningitis and meningococcemia, is capable of invading and colonizing the urogenital tract. This can result in urethritis, akin to the syndrome caused by its sister species,N. gonorrhoeae , the etiologic agent of gonorrhea. Recently, meningococcal strains associated with outbreaks of urethritis were reported to share genetic characteristics with the gonococcus, raising the question of the extent to which these strains contain features that promote adaptation to the genitourinary niche, making them gonococcus-like and distinguishing them from otherN. meningitidis strains. Here, we analyzed the genomes of 39 diverseN. meningitidis isolates associated with urethritis, collected independently over a decade and across three continents. In particular, we characterized the diversity of the nitrite reductase gene (aniA ), the factor H-binding protein gene (fHbp ), and the capsule biosynthetic locus, all of which are loci previously suggested to be associated with urogenital colonization. We observed notable diversity, including frameshift variants, inaniA andfHbp and the presence of intact, disrupted, and absent capsule biosynthetic genes, indicating that urogenital colonization and urethritis caused byN. meningitidis are possible across a range of meningococcal genotypes. Previously identified allelic patterns in urethritis-associatedN. meningitidis strains may reflect genetic diversity in the underlying meningococcal population rather than novel adaptation to the urogenital tract.

Genomic Characterization of Urethritis-Associated Neisseria meningitidis Shows that a Wide Range of N. meningitidis Strains Can Cause Urethritis