Far-Reaching Dispersal of Borrelia burgdorferi Sensu Lato-Infected Blacklegged Ticks by Migratory Songbirds in Canada

Lyme disease has been documented in northern areas of Canada, but the source of the etiological bacterium, Borrelia burgdorferi sensu lato (Bbsl) has been in doubt. We collected 87 ticks from 44 songbirds during 2017, and 24 (39%) of 62 nymphs of the blacklegged tick, Ixodes scapularis, were positiv...

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Bibliographic Details
Published in:Healthcare
Main Authors: John D. Scott, Kerry L. Clark, Janet E. Foley, Bradley C. Bierman, Lance A. Durden
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2018
Subjects:
Lyme disease
Borrelia burgdorferi sensu lato
blacklegged ticks
Ixodes scapularis
songbirds
bird migration
northern Canada
Medicine
R
Newfoundland
Canada
Online Access:https://doi.org/10.3390/healthcare6030089
https://doaj.org/article/0ee9ccfd495a45919f2fe59051b8702b
Description
Summary:Lyme disease has been documented in northern areas of Canada, but the source of the etiological bacterium, Borrelia burgdorferi sensu lato (Bbsl) has been in doubt. We collected 87 ticks from 44 songbirds during 2017, and 24 (39%) of 62 nymphs of the blacklegged tick, Ixodes scapularis, were positive for Bbsl. We provide the first report of Bbsl-infected, songbird-transported I. scapularis in Cape Breton, Nova Scotia; Newfoundland and Labrador; north-central Manitoba, and Alberta. Notably, we report the northernmost account of Bbsl-infected ticks parasitizing a bird in Canada. DNA extraction, PCR amplification, and DNA sequencing reveal that these Bbsl amplicons belong to Borrelia burgdorferi sensu stricto (Bbss), which is pathogenic to humans. Based on our findings, health-care providers should be aware that migratory songbirds widely disperse B. burgdorferi-infected I. scapularis in Canada’s North, and local residents do not have to visit an endemic area to contract Lyme disease.

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