Surveillance sentinelle du risque de la maladie de Lyme au Canada, 2019 : résultats de la première année du Réseau sentinelle canadien de surveillance de la maladie de Lyme (ReSCaL)

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DOI

https://doi.org/10.14745/ccdr.v46i10a08f

Language of the publication
French
Date
2020-10-01
Type
Article
Author(s)
  • Guillot, Camille
  • Badcock, Jackie
  • Clow, Katie
  • Cram, Jennifer
  • Dergousoff, Shaun
  • Dibernardo, Antonia
  • Evason, Michelle
  • Fraser, Erin
  • Galanis, Eleni
  • Gasmi, Salima
  • German, Greg J.
  • Howse, Douglas T.
  • Jardine, Claire
  • Jenkins, Emily
  • Koffi, Jules
  • Kulkarni, Manisha
  • Lindsay, L. Robbin
  • Lumsden, Genevieve
  • McKay, Roman
  • Morshed, Muhammad
  • Munn, Douglas
  • Nelder, Mark
  • Nocera, Joe
  • Ripoche, Marion
  • Rochon, Kateryn
  • Russell, Curtis
  • Slatculescu, Andreea
  • Talbot, Benoit
  • Thivierge, Karine
  • Voordouw, Maarten
  • Bouchard, Catherine
  • Leighton, Patrick
Publisher
Agence de la santé publique du Canada

Abstract

BACKGROUND: Lyme disease is an emerging vector-borne zoonotic disease of increasing public health importance in Canada. As part of its mandate, the Canadian Lyme Disease Research Network (CLyDRN) launched a pan-Canadian sentinel surveillance initiative, the Canadian Lyme Sentinel Network (CaLSeN), in 2019. OBJECTIVES: To create a standardized, national sentinel surveillance network providing a real-time portrait of the evolving environmental risk of Lyme disease in each province. METHODS: A multicriteria decision analysis (MCDA) approach was used in the selection of sentinel regions. Within each sentinel region, a systematic drag sampling protocol was performed in selected sampling sites. Ticks collected during these active surveillance visits were identified to species, and Ixodes spp. ticks were tested for infection with Borrelia burgdorferi, Borrelia miyamotoi, Anaplasma phagocytophilum, Babesia microti and Powassan virus. RESULTS: In 2019, a total of 567 Ixodes spp. ticks (I. scapularis [n=550]; I. pacificus [n=10]; and I. angustus [n=7]) were collected in seven provinces: British Columbia, Manitoba, Ontario, Québec, New Brunswick, Nova Scotia and Prince Edward Island. The highest mean tick densities (nymphs/100 m2) were found in sentinel regions of Lunenburg (0.45), Montréal (0.43) and Granby (0.38). Overall, the Borrelia burgdorferi prevalence in ticks was 25.2% (0%-45.0%). One I. angustus nymph from British Columbia was positive for Babesia microti, a first for the province. The deer tick lineage of Powassan virus was detected in one adult I. scapularis in Nova Scotia. CONCLUSION: CaLSeN provides the first coordinated national active surveillance initiative for tick-borne disease in Canada. Through multidisciplinary collaborations between experts in each province, the pilot year was successful in establishing a baseline for Lyme disease risk across the country, allowing future trends to be detected and studied.

Subject

  • Health

Rights

Pagination

399-407

Peer review

Yes

Open access level

Gold

Identifiers

ISSN
1719-3109

Article

Journal title
Relevé des maladies transmissibles au Canada
Journal volume
46
Journal issue
10

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Collection(s)

Public health surveillance

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