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Influenza Surveillance at IRID

Influenza Surveillance at IRID. Immunization and Respiratory Infections Division Centre for Infectious Disease Prevention & Control Public Health Agency of Canada. Impact of Influenza. In Canada: 10-25% of population affected yearly (higher infection rates in children and elderly)

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Influenza Surveillance at IRID

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  1. Influenza Surveillanceat IRID Immunization and Respiratory Infections Division Centre for Infectious Disease Prevention & Control Public Health Agency of Canada

  2. Impact of Influenza In Canada: • 10-25% of population affected yearly (higher infection rates in children and elderly) • 70-75,000 hospitalizations • 6-7,000 deaths due to pneumonia and influenza • 500-1,500 deaths due to influenza

  3. Canada’s National Influenza Surveillance Program Primary Objectives : 1) Early detection and monitoring of influenza outbreaks 2) Provide timely and up-to-date reporting of influenza activity in Canada and abroad to professionals & public 3) Monitor circulating strains of influenza virus, including new sub-types 4) Contribute to the information for vaccine composition for following season

  4. Influenza Surveillance Data Provider Indicator Sentinel Physicians ILI Consultations Laboratories Number of Influenza tests and positives National Microbiology Laboratory Strain Characterization Influenza activity levels (outbreaks etc) Provincial/Territorial Epidemiologists

  5. Uses of Surveillance Data • estimating disease impact • influenza-like illnessclinic visits • influenza and pneumonia hospitalizations and deaths • all cause mortality • other health and economic impacts • monitoring viral evolution • identification of predominant strains • detection of new strains/subtypes Influenza prevention and control policies Vaccine composition program development and timing

  6. Number of Influenza regions reporting widespread or localized activity

  7. Seasonal Distributuion of Laboratory Confirmed Influenza Infections by influenza type, Canada 1997-2004

  8. Influenza Tests, % positive, & ILI rates, Canada, by report week, 2003-2004

  9. Proportion of lab-confirmed influenza by age-group, Canada, 2003-2004

  10. Influenza Strain Identification

  11. Influenza Activity Level by Provincial and Territorial Influenza Surveillance Regions, Canada,Week 03 2004

  12. FluWatch on the Webhttp://www.phac-aspc.gc.ca/fluwatch/index.html

  13. New Initiatives…. • Impact of influenza in children - hospitalizations • Sentinel hospital-based surveillance • Trained nurse monitor at each centre identifies eligible cases and completes detailed case report forms

  14. New Initiatives.. Canadian Network for Public Health Intelligence (CNPHI) • CNPHI is a secure internet-based suite of applications and resources. • It is primarily directed towards strategic public health information and intelligence sharing. • Included applications: • Atlantic Canada FluWatch Application • Canadian Integrated Outbreak Surveillance Centre (CIOSC).

  15. New Initiatives: CNPHI

  16. Canadian Integrated Outbreak Surveillance Centre (CIOSC)

  17. Canadian Integrated Outbreak Surveillance Centre (CIOSC) • Goal: To enhance public health’s capacity to anticipate and detect health risks associated with communicable disease threats.

  18. Severe Respiratory Illness (SRI) Surveillance SRI Alerts: An SRI alert is an operational definition used to ensure that individuals meeting specific criteria are identified in a systematic way to allow for implementation of appropriate infection control and public health measures until SARS or other emerging respiratory pathogen has been ruled out as a cause of the illness

  19. SRI Alerts • An SRI alert is sent under the following situations: • An individual is hospitalized with an SRI and has a potential epidemiologic link to a source of emerging respiratory pathogen • Clusters of SRI are identified within a health care unit • An individual has been identified with laboratory evidence of a SARS-CoV infection (or other emerging respiratory infection) • An individual has been identified with a laboratory confirmed influenza A/ H5N1 or other novel influenza virus infection

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