alexa Increased case-fatality rate associated with outbreaks of Neisseria meningitidis infection, compared with sporadic meningococcal disease, in the United States, 1994-2002.
Psychiatry

Psychiatry

Clinical Depression

Author(s): Brooks R, Woods CW, Benjamin DK Jr, Rosenstein NE

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Abstract BACKGROUND: Outbreaks of meningococcal disease are infrequent but important public health events. We characterize outbreak-associated cases in the United States and compare them with sporadic disease. METHODS: Outbreaks of meningococcal disease that occurred during the period of 1 July 1994 through 30 June 2002 were identified through state health departments, Centers for Disease Control and Prevention records, and a review of newspapers and the medical literature. Cases associated with outbreaks were compared with sporadic cases identified through population-based surveillance. RESULTS: We identified 69 outbreaks of Neisseria meningitidis infection (median, 9.5 outbreaks per year; range, 3-14 outbreaks per year), which involved 229 patients from 30 states. Forty-three (62\%) of the outbreaks involved N. meningitidis serogroup C, 17 (25\%) involved serogroup B, and 9 (13\%) involved serogroup Y. Twenty-five outbreaks (36\%) occurred in communities, and 44 (64\%) were organization based, including 12 that occurred in colleges and universities, 19 that occurred in primary and secondary schools, and 8 that occurred in nursing homes. Vaccination campaigns (with the A/C/Y/W-135 meningococcal polysaccharide vaccine) were conducted for 31 outbreaks (28 involving serogroup C and 3 involving serogroup Y). After controlling for age, serogroup, and clinical presentation, outbreak-associated cases were associated with a higher case-fatality rate than were sporadic cases (21\% vs. 11\%; odds ratio, 3.3; 95\% confidence interval, 2.0-5.5). CONCLUSIONS: Outbreaks remain an important but infrequent public health issue, representing <2\% of all cases of meningococcal disease. However, given the increased case-fatality rate found among outbreak-related cases of N. meningitidis infection, additional investigation of factors that favor the transmission and virulence of outbreak-related strains is warranted. This article was published in Clin Infect Dis and referenced in Clinical Depression

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