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Measles surveillance in Canada: Trends for 2013
A Shane1, J Hiebert2, L Sherrard1
1Centre for Immunization and Respiratory Infectious Diseases, Public Health Agency of Canada, Ottawa, ON.
Summary
In 2013, Canada reported 83 measles cases, with highest incidence in young children. Despite challenges, the country maintained progress toward measles elimination goals.
Area of Science:
- Public Health
- Epidemiology
- Immunology
Background:
- Measles elimination requires ongoing surveillance and documentation of disease activity.
- Canada has been working to maintain its measles-free status since 2000.
Purpose of the Study:
- To describe measles activity in Canada during 2013.
- To support the documentation and maintenance of measles elimination status.
Main Methods:
- Descriptive analysis of measles cases, incidence, age groups, immunization history, and hospitalizations.
- Utilized data from the Canadian Measles and Rubella Surveillance System.
- Summarized outbreak information, genotype data, and phylogenetic analysis.
Main Results:
- 83 confirmed measles cases reported across seven provinces/territories, with an incidence of 2.4 per million population.
- Highest incidence observed in age groups under 1 year and 1-4 years.
- Three-quarters of cases were inadequately immunized; 10% required hospitalization. Nine outbreaks occurred, including a large one in a non-immunizing community.
Conclusions:
- 2013 marked the fifth highest number of measles cases since 1998.
- Challenges include measles importation and varied immunization coverage.
- Canada met or partially met all Pan American Health Organization criteria for measles elimination in 2013.
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