S Gasmi1, N H Ogden2, L R Lindsay3, S Burns4, S Fleming5, J Badcock6, S Hanan6, C Gaulin7, M A Leblanc7, C Russell8, M Nelder8, L Hobbs8, S Graham-Derham9, L Lachance10, A N Scott11,12, E Galanis13, J K Koffi1. 1. Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Saint-Hyacinthe, QC. 2. Public Health Risk Sciences Division, National Microbiology Laboratory, Public Health Agency of Canada, Saint-Hyacinthe, QC. 3. National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB. 4. Communicable Disease Program, Department of Health and Wellness, Charlottetown, PE. 5. Public Health Branch, Nova Scotia Department of Health and Wellness, Halifax, NS. 6. Office of the Chief Medical Officer of Health, New Brunswick Department of Health, Fredericton, NB. 7. Direction de la protection, Ministère de la santé et des services sociaux, Québec, QC. 8. Enteric, Zoonotic and Vector-Borne Diseases, Public Health Ontario, Toronto, ON. 9. Communicable Disease Control Branch, Manitoba Health Seniors and Active Living, Winnipeg, MB. 10. Surveillance and Assessment Branch, Alberta Health, Calgary, AB. 11. Health and Wellness Promotion Branch, Alberta Health, Edmonton, AB. 12. Analytics and Performance Reporting Branch, Alberta Health, Edmonton, AB. 13. Enteric and Zoonotic Diseases, BC Centre for Disease Control, Vancouver, BC.
Abstract
OBJECTIVE: To summarize seven years of surveillance data for Lyme disease cases reported in Canada from 2009 to 2015. METHODS: We describe the incidence over time, seasonal and geographic distribution, demographic and clinical characteristics of reported Lyme disease cases. Logistic regression was used to explore differences between age groups, sex and year to better understand potential demographic risk factors for the occurrence of Lyme disease. RESULTS: The number of reported Lyme disease cases increased more than six-fold, from 144 in 2009 to 917 in 2015, mainly due to an increase in infections acquired in Canada. Most locally acquired cases were reported between May and November. An increase in incidence of Lyme disease was observed in provinces from Manitoba eastwards. This is consistent with our knowledge of range expansion of the tick vectors in this region. In the western provinces the incidence has remained low and stable. All cases reported by Alberta, Saskatchewan and Newfoundland and Labrador were acquired outside of the province, either elsewhere in Canada or abroad. There was a bimodal distribution for Lyme disease by age with peaks at 5-9 and 45-74 years of age. The most common presenting symptom was a single erythema migrans rash (74.2%) and arthritis (35.7%). Variations in the frequency of reported clinical manifestations were observed among age groups and years of study. CONCLUSION: Lyme disease incidence continues to increase in Canada as does the geographic range of ticks that carry the Lyme disease bacteria. Ongoing surveillance, preventive strategies as well as early disease recognition and treatment will continue to minimize the impact of Lyme disease in Canada.
OBJECTIVE: To summarize seven years of surveillance data for Lyme disease cases reported in Canada from 2009 to 2015. METHODS: We describe the incidence over time, seasonal and geographic distribution, demographic and clinical characteristics of reported Lyme disease cases. Logistic regression was used to explore differences between age groups, sex and year to better understand potential demographic risk factors for the occurrence of Lyme disease. RESULTS: The number of reported Lyme disease cases increased more than six-fold, from 144 in 2009 to 917 in 2015, mainly due to an increase in infections acquired in Canada. Most locally acquired cases were reported between May and November. An increase in incidence of Lyme disease was observed in provinces from Manitoba eastwards. This is consistent with our knowledge of range expansion of the tick vectors in this region. In the western provinces the incidence has remained low and stable. All cases reported by Alberta, Saskatchewan and Newfoundland and Labrador were acquired outside of the province, either elsewhere in Canada or abroad. There was a bimodal distribution for Lyme disease by age with peaks at 5-9 and 45-74 years of age. The most common presenting symptom was a single erythema migrans rash (74.2%) and arthritis (35.7%). Variations in the frequency of reported clinical manifestations were observed among age groups and years of study. CONCLUSION: Lyme disease incidence continues to increase in Canada as does the geographic range of ticks that carry the Lyme disease bacteria. Ongoing surveillance, preventive strategies as well as early disease recognition and treatment will continue to minimize the impact of Lyme disease in Canada.
Authors: Klaus Kurtenbach; Klára Hanincová; Jean I Tsao; Gabriele Margos; Durland Fish; Nicholas H Ogden Journal: Nat Rev Microbiol Date: 2006-08-07 Impact factor: 60.633
Authors: N H Ogden; J K Koffi; L R Lindsay; S Fleming; D C Mombourquette; C Sanford; J Badcock; R R Gad; N Jain-Sheehan; S Moore; C Russell; L Hobbs; R Baydack; S Graham-Derham; L Lachance; K Simmonds; A N Scott Journal: Can Commun Dis Rep Date: 2015-06-04
Authors: Ian R C Davis; Shelly A McNeil; Wanda Allen; Donna MacKinnon-Cameron; L Robbin Lindsay; Katarina Bernat; Antonia Dibernardo; Jason J LeBlanc; Todd F Hatchette Journal: J Clin Microbiol Date: 2020-06-24 Impact factor: 5.948
Authors: Jerilyn R Izac; Andrew C Camire; Christopher G Earnhart; Monica E Embers; Rebecca A Funk; Edward B Breitschwerdt; Richard T Marconi Journal: Vaccine Date: 2019-03-25 Impact factor: 3.641
Authors: M P Nelder; S Wijayasri; C B Russell; K O Johnson; A Marchand-Austin; K Cronin; S Johnson; T Badiani; S N Patel; D Sider Journal: Can Commun Dis Rep Date: 2018-10-04