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The disease burden of invasive meningococcal serogroup B disease in Canada
Julie A Bettinger1, David W Scheifele, Nicole Le Saux
1Vaccine Evaluation Center, BC Children's Hospital and University of British Columbia, Vancouver, British Columbia, Canada. jbettinger@cfri.ca
Background:
Invasive meningococcal disease remains a rare but deadly infection in Canada. New serogroup B vaccines may offer the potential for prevention and control. This report examines the disease burden caused by serogroup B invasive meningococcal infections.
Methods:
From 2002 to 2011, active, population-based metropolitan area surveillance for adult and pediatric hospital admissions for adult and pediatric hospital admissions for laboratory-confirmed infection with Neisseria meningitidis, was conducted by the 12 centers of the Canadian Immunization Monitoring Program, Active.
Results:
A total of 769 invasive meningococcal cases occurred from 2002 to 2011; 54% (n = 413) in children with a peak incidence of 6.16 (95% confidence interval: 3.18-10.76) per 100,000 in children aged <1 year in 2009. Serogroup B accounted for the largest proportion of cases and had the highest incidence of all serogroups across all ages, with a peak incidence of 0.31 (0.23-0.40) per 100,000 in 2007. Serogroup B case fatality rate was 4.3% in children, and 21% of pediatric survivors had sequelae. B:17:P1.19 ST-269 was the most frequently detected antigenic type.
Conclusions:
Serogroup B invasive meningococcal infections caused substantial morbidity and mortality and are the leading cause of invasive meningococcal disease in Canada. The proportion of cases potentially preventable with the new serogroup B vaccines should be evaluated to determine whether universal immunization programs are warranted.
Insights
Invasive meningococcal disease caused by serogroup B is a significant health concern in Canada, particularly in young children. Evaluating new serogroup B vaccines is crucial for potential prevention and control strategies.
Area of Science:
- Public Health
- Epidemiology
- Vaccinology
Background:
- Invasive meningococcal disease (IMD) is a rare but severe infection in Canada.
- New vaccines targeting serogroup B offer potential for IMD prevention and control.
- This study examines the disease burden of serogroup B IMD in Canada.
Purpose of the Study:
- To analyze the incidence and characteristics of invasive meningococcal disease in Canada from 2002 to 2011.
- To specifically assess the burden of serogroup B invasive meningococcal infections.
- To inform potential vaccination strategies.
Main Methods:
- Active, population-based surveillance was conducted in 12 Canadian metropolitan areas.
- Data collected included laboratory-confirmed Neisseria meningitidis infections in adults and children.
- Surveillance period spanned from 2002 to 2011.
Main Results:
- A total of 769 IMD cases were recorded between 2002 and 2011.
- Serogroup B was the most common cause of IMD, with the highest incidence across all age groups.
- Peak incidence in infants under 1 year was observed in 2009; serogroup B incidence peaked in 2007.
Conclusions:
- Serogroup B IMD significantly contributes to morbidity and mortality in Canada.
- Serogroup B is the leading cause of IMD in the country.
- Further evaluation of serogroup B vaccine effectiveness is needed to consider universal immunization programs.
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