Catherine Bouchard

Catherine Bouchard
Public Health Agency of Canada | PHAC · National Microbiology Laboratory at St-Hyacinthe

DVM, PhD (epidemiology)

About

47
Publications
8,062
Reads
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780
Citations
Citations since 2016
40 Research Items
647 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Additional affiliations
January 2016 - June 2016
Université de Montréal
Position
  • Veterinary epidemiologist - Research consultant

Publications

Publications (47)
Article
Full-text available
Objectives With vector-borne diseases emerging across the globe, precipitated by climate change and other anthropogenic changes, it is critical for public health authorities to have well-designed surveillance strategies in place. Sentinel surveillance has been proposed as a cost-effective approach to surveillance in this context. However, spatial d...
Article
Lyme disease (LD) risk is emerging rapidly in Canada due to range expansion of its tick vectors, accelerated by climate change. The risk of contracting LD varies geographically due to variability in ecological characteristics that determine the hazard (the densities of infected host-seeking ticks) and vulnerability of the human population determine...
Article
Public health management of Lyme disease (LD) is a dynamic challenge in Canada. Climate warming is driving the northward expansion of suitable habitat for the tick vector, Ixodes scapularis. Information about tick population establishment is used to inform the risk of LD but is challenged by sampling biases from surveillance data. Misclassifying ar...
Article
Full-text available
The development of interventions that reduce Lyme disease incidence remains a challenge. Reservoir-targeted approaches aiming to reduce tick densities or tick infection prevalence with Borrelia burgdorferi have emerged as promising ways to reduce the density of infected ticks. Acaricides of the isoxazoline family offer high potential for reducing i...
Article
Full-text available
Lyme disease (LD) is a tick-borne disease which has been emerging in temperate areas in North America, Europe, and Asia. In Quebec, Canada, the number of human LD cases is increasing rapidly and thus surveillance of LD risk is a public health priority. In this study, we aimed to evaluate the ability of active sentinel surveillance to track spatiote...
Article
Full-text available
Background Tick-borne diseases, and especially Lyme Disease (LD), are on the rise in Canada and have been met with increasing public health concern. To face these emerging threats, education on the prevention of tick bites remains the mainstay of public health intervention. The objective of this study was to assess the adoption of preventive behavi...
Article
Full-text available
Ixodes scapularis ticks are expanding their range in parts of northeastern North America, bringing with them pathogens of public health concern. While rodents like the white-footed mouse, Peromyscus leucopus , are considered the primary reservoir of many emerging tick-borne pathogens, the contribution of birds, as alternative hosts and reservoirs,...
Article
Full-text available
As the incidence of tick-borne diseases has sharply increased over the past decade, with serious consequences for human and animal health, there is a need to identify ecological drivers contributing to heterogeneity in tick-borne disease risk. In particular, the relative importance of animal host dispersal behaviour in its three context-dependent p...
Article
The incidence of Lyme disease is increasing in Québec and is closely linked to the distribution of Ixodes scapularis ticks. A time-to-establishment model developed in 2012 by Leighton and colleagues predicted the year of tick population establishment for each municipality in eastern Canada. To validate if this model correctly predicted tick distrib...
Poster
Tick vectors of multiple human diseases (Lyme disease, babesiosis, anaplasmosis, ehrlichiosis) continue to expand in North America. We developed an ensemble of statistical and mechanistic models to predict the number of host-seeking ticks at seven National Ecological Observation Network (NEON) sites, as part of the Ecological Forecasting Initiative...
Article
The tick vector of Lyme disease, Ixodes scapularis, is currently expanding its geographical distribution northward into southern Canada driving emergence of Lyme disease in the region. Despite large-scale studies that attributed different factors such as climate change and changes in land use to the geographical expansion of the tick, a comprehensi...
Article
Vector-borne diseases (VBDs) are continuing to emerge globally, requiring new surveillance systems to follow increasing VBD risk for human populations. Sentinel surveillance is an approach that allows tracking of disease risk through time using limited resources. However, there is no consensus on how best to design a sentinel surveillance network i...
Article
Identifying ecological drivers of tick-borne pathogen spread has great value for tick-borne disease management. However, theoretical investigations into the consequences of host movement behaviour on pathogen spread dynamics in heterogeneous landscapes remain limited because spatially explicit epidemiological models that incorporate more realistic...
Article
Rabies occurs throughout the Arctic, representing an ongoing public health concern for residents of northern communities. The Arctic fox (Vulpes lagopus) is the main reservoir of the Arctic rabies virus variant, yet little is known about the epidemiology of Arctic rabies, such as the ecological mechanisms driving where and when epizootics in fox po...
Article
Full-text available
Climate change is facilitating the geographic range expansion of populations of the tick vector of Lyme disease Ixodes scapularis in Canada. Here, we characterize and map the spatio-temporal variability of environments suitable for I. scapularis using Earth observation (EO) data. A simple algorithm for I. scapularis occurrence (cumulative degree-da...
Article
Full-text available
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, n...
Article
Full-text available
Background: Recent evidence suggests that climate change and other factors are leading to the emergence of Lyme disease in the province of Quebec, where it previously did not exist. As risk areas expand further north, the population can adopt specific preventive behaviors to limit chances of infection. The objectives of this study were to (1) crea...
Article
Full-text available
Background: To monitor the adoption of climate change adaptive behaviors in the population, public health authorities have to conduct national surveys, which can help them target vulnerable subpopulations. To ensure reliable estimates of the adoption of these preventive behaviors, many data collection methods are offered by polling firms. The aim...
Article
Full-text available
Background: Lyme disease (LD) is an increasing public health threat in temperate zones of the northern hemisphere, yet relatively few methods exist for reducing LD risk in endemic areas. Disrupting the LD transmission cycle in nature is a promising avenue for risk reduction. This experimental study evaluated the efficacy of fluralaner, a recent ora...
Article
Full-text available
Background: Lyme disease is emerging in Canada due to expansion of the range of the tick vector Ixodes scapularis from the United States. National surveillance for human Lyme disease cases began in Canada in 2009. Reported numbers of cases increased from 144 cases in 2009 to 2025 in 2017. It has been claimed that few (< 10%) Lyme disease cases are...
Technical Report
Full-text available
Rapport de synthèse: Distribution géographique et saisonnière des espèces de tiques d’importance médicale autres qu’Ixodes scapularis au Québec https://www.inspq.qc.ca/sites/default/files/publications/2546_distribution_geographique_tique_autres_ixodes_scapularis.pdf
Poster
Context. Lyme disease (LD) is an important North American tick-born disease that is emerging in Canada. In parallel, new effective drugs against ticks like fluralaner, an Isoxazoline, appear on the market. Objective. Reduce LD transmission risk to humans by treating ecological reservoirs of its etiological agent with fluralaner. Methodology. Evalua...
Article
Full-text available
The number of human cases of several climate-related infectious diseases, including tick- and mosquito-borne diseases, has increased in Canada and other parts of the world since the end of the last century. Predicting and mapping the risks associated with these diseases using environmental and climatic determinants derived from satellite images is...
Article
Full-text available
Climate change has been linked with the establishment and geographical expansion of zoonotic diseases, an example of which is the well-documented increase in human cases of Lyme disease in Quebec, Canada. As temperatures continue to increase in Quebec, it is anticipated that several zoonotic diseases will be affected. In response to the growing zoo...
Article
Full-text available
Le nombre de cas de plusieurs maladies infectieuses liées au climat chez l’humain, y compris les maladies transmises par les tiques et les moustiques, a augmenté au Canada et dans d’autres parties du monde depuis la fin du siècle dernier. Une nouvelle méthode utilisant des images satellites pour cerner les déterminants environnementaux et climatiqu...
Article
Full-text available
The aim of this study is to document climate change adaptation interventions targeting Lyme disease at the municipal level in the province of Quebec (Canada). This exploratory study relies on the theory of planned behavior and certain constructs from the health belief model to identify the factors leading municipal authorities to implement preventi...
Poster
Full-text available
Introduction/background: The aim of this study is to examine the current state of health-related adaptation at the municipal level in the province of Quebec (Canada), especially interventions targeting Lyme disease. This study relies on the theory of planned behavior (TPB) and certain constructs from the health belief model to identify the factors...
Article
Full-text available
Climate warming and other environmental changes have contributed to the expansion of the range of several tick species into higher latitudes in North America. As temperatures increase in Canada, the environment becomes more suitable for ticks and the season suitable for tick activity lengthens, so tick-borne diseases are likely to become more commo...
Article
Full-text available
Lyme disease, the most commonly reported vector-borne disease in North America, is caused by the spirochete Borrelia burgdorferi sensu stricto, which is transmitted by Ixodes scapularis in eastern Canada and Ixodes pacificus in western Canada. Recently, the northward range expansion of I. scapularis ticks, in south-eastern Canada, has resulted in a...
Article
Full-text available
Climate change is driving emergence and establishment of Ixodes scapularis, the main vector of Lyme disease in Québec, Canada. As for the black-legged tick, I. scapularis Say, global warming may also favor northward expansion of other species of medically important ticks. The aims of this study were to determine (1) current diversity and abundance...
Article
Full-text available
Background: The risk of contracting Lyme disease (LD) can vary spatially because of spatial heterogeneity in risk factors such as social-behavior and exposure to ecological risk factors. Integrating these risk factors to inform decision-making should therefore increase the effectiveness of mitigation interventions. Objectives: The objective of t...
Technical Report
Au Québec comme dans le monde, les maladies transmises entre les animaux et les humains (zoonoses), qui représentent environ 60 % des maladies transmissibles à l’humain, sont en émergence. La dynamique complexe des zoonoses peut être influencée par les changements climatiques. Pour répondre à cette complexité, l’Observatoire multipartite québécois...
Article
Full-text available
Widespread access to the internet is offering new possibilities for data collection in surveillance. We explore, in this study, the possibility of using an electronic tool to monitor occurrence of the tick vector of Lyme disease, Ixodes scapularis. The study aimed to compare the capacity for ticks to be identified in web-based submissions of digita...
Article
Lyme disease (LD) risk is increasing in Canada. In 2014, the government of Canada launched a national communication campaign to raise awareness and promote the adoption of individual preventive behaviours toward ticks and LD. The objectives of this study were to evaluate and compare the adoption of LD preventive behaviours and the exposure to tick...
Article
Full-text available
Lyme disease (LD) is emerging in Canada. A key preventive strategy is promoting the adoption by the general public of personal preventive behaviors regarding tick bites. The aim of this study was to measure the changes in public awareness toward ticks and LD before and after the launch of a national communication campaign in Canada using data from...
Article
There is an increasing risk of Lyme disease in Canada due to range expansion of the tick vector, Ixodes scapularis. The objectives of this article are to i) raise public awareness with the help of veterinarians on the emerging and expanding risk of Lyme disease across Canada, ii) review the key clinical features of Lyme disease in dogs, and iii) pr...
Article
Full-text available
Les approches ecosystemiques de la sante (AES) reconnaissent l’interdependance de la sante humaine et animale, de la sante des ecosystemes et de la societe. Dans cet article, nous nous pencherons particulierement sur la transdisciplinarite, l’un des six principes associes a ces approches. L’objectif general de cet article est d’explorer comment la...
Thesis
Full-text available
Since the 90s in Canada, studies have identified new endemic areas for the agent of Lyme disease, Borrelia burgdorferi and the tick vector, Ixodes scapularis. These newly endemic areas for complex I. scapularis - B. burgdorferi are prime areas to study the transmission cycle in its environmental context. The main objective of this project is to stu...
Article
Full-text available
It has been suggested that increasing biodiversity, specifically host diversity, reduces pathogen and parasite transmission amongst wildlife (causing a "dilution effect"), whereby transmission amongst efficient reservoir hosts, (e.g. Peromyscus spp. mice for the agent of Lyme disease Borrelia burgdorferi) is reduced by the presence of other less ef...
Article
Full-text available
Due to recent establishment of the blacklegged tick, Ixodes scapularis Say, in southeastern Canada, tick-borne zoonoses (Lyme disease, human granulocytotropic anaplasmosis, and babesiosis) are of growing concern for public health. Using white-tailed deer (Odocoileus virginianus) culled in southwestern Quebec during 2007-2008, we investigated whethe...
Article
Immature Ixodes scapularis infestation and Borrelia burgdorferi infection of wild small mammals were studied from June to October in 2007 and from May to October in 2008 at 71 study sites in a zone where I. scapularis populations and environmental Lyme disease risk are emerging in southwestern Quebec. Seasonal host-seeking activity of immature I. s...
Article
Full-text available
Northward expansion of the tick Ixodes scapularis is driving Lyme disease (LD) emergence in Canada. Information on mechanisms involved is needed to enhance surveillance and identify where LD risk is emerging. We used passive and active surveillance and phylogeographic analysis of Borrelia burgdorferi to investigate LD risk emergence in Quebec. In a...

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Projects

Projects (5)
Project
Lyme disease, caused by the bacteria Borrelia burgdorferi, and its vector, the black-legged tick Ixodes scapularis, is currently emerging in southern Quebec. One approach to reduce the risk of Lyme disease is to treat the rodent reservoirs of the disease in nature to control ticks and thus interrupt local endemic cycle of the disease. My Ph D project focuses on evaluating a new approach for treating wild rodents with potential applications for the control of tick populations in periurban environements.
Project
La création de l’Observatoire québécois de l’adaptation aux changements climatiques (OQACC) est l’aboutissement d’une démarche amorcée en 2013, inscrite dans le volet santé du Plan d’action 2013-2020 sur les changements climatiques (PACC 2020). Avec l’implantation des nombreuses initiatives au cours des dernières années, il existe un réel besoin de déterminer si les mesures d’adaptation promues par les autorités de santé publique sont adoptées par la population et les organisations, de mieux comprendre ce qui favorise ou non leur adoption et enfin de suivre l’évolution de ces mesures dans le temps. Plusieurs projets devraient permettre de répondre à ce besoin. Un de ceux-ci consistait à mettre en place un observatoire des comportements d’adaptation individuels et organisationnels aux changements climatiques. Officiellement créé en décembre 2014, l’OQACC a pour mission d’améliorer la connaissance des pratiques d’adaptation aux changements climatiques au Québec. Dans une perspective de santé publique et de promotion de la santé, il s’avère en effet essentiel de documenter davantage les efforts d’adaptation aux changements climatiques d’un point de vue individuel et organisationnel.