As part of Enhanced Meningococcal Disease Surveillance (EMDS)**, additional data and isolates were collected from 45 state and 3 large jurisdiction health departments. In 2016, the population under surveillance was 316,931,626 or 98% of the U.S. population. EMDS focuses on: (1) collecting isolates from all cases; (2) collecting complete case information, with an emphasis on college attendance for cases aged 15–24 years; history of sex with men for male cases aged ≥16 years; and HIV infection status for all cases. CSTE case definition: A confirmed case was defined as isolation of Neisseria meningitidis or detection of N. meningitidis by PCR from a normally sterile body site. A probable case was defined as detection of N. meningitidis antigen by latex agglutination or immunohistochemistry. NCIRD-EMS-Report.pdf

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