Risk Factors for Invasive Meningococcal Disease Belonging to a Novel Urethritis Clade of Neisseria meningitidis-United States, 2013-2017.

We describe cases of invasive meningococcal disease caused by nongroupable Neisseria meningitidis belonging to a novel phylogenetic clade associated with urethritis. Seven cases were identified, comprising 0.6% of sequenced invasive meningococcal disease isolates from 2013 to 2017. Five patients had a known or likely immunocompromising condition, including 2 with a complement deficiency.