Different Ecological Niches for Ticks of Public Health Significance in Canada.

摘要: Tick-borne diseases are a growing public health concern as their incidence and range have increased in recent decades. Lyme disease is an emerging infectious Canada due to northward expansion of the geographic Ixodes scapularis, principal tick vector for agent Borrelia burgdorferi, into central eastern Canada. In this study geographical distributions Ixodid ticks, including I. environmental factors associated with occurrence were investigated New Brunswick, Canada, where few scapularis populations been found date. Density host-seeking ticks was evaluated by drag sampling woodland habitats total 159 sites. (n = 5) on four sites, muris 1) one site Haemaphysalis leporispalustris 243) 41 One adult collected PCR-positive B. burgdorferi. No variables significantly presence although comparisons surveillance data neighbouring provinces (Quebec Nova Scotia) suggested that temperature conditions may be too cold ( 0°C]) across much Brunswick. contrast, H. leporispalustris, which competent tularaemia, (P 0°C, mean annual precipitation, percentage clay soil, elevation season multivariable logistic regression model. With exception some localized areas, deer density low establishment risk areas while suitable at many These findings indicate differing ecological niches two species significance.