Publications

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lyme disease vector, ixodes dammini, identified in quebec. 19892598289
lyme disease in canada with possible transmission by an insect.the first documented case of lyme disease to have originated in canada is presented. a 51-year old french female nurse visited quebec, canada from 20 july to 5 august, 1984 and contracted lyme disease. she reported an insect bite on 3 august 1984 on the back of her knee with erythema chronicum migrans appearing at the site of the bite on 5 august 1984. the patient presented with meningeal lymphocytic reaction near the end of september, 1984. total ig serum titers in indirect immunofluorescence t ...19873591106
ixodes scapularis ticks collected by passive surveillance in canada: analysis of geographic distribution and infection with lyme borreliosis agent borrelia burgdorferi.passive surveillance for the occurrence of the tick ixodes scapularis say (1821) and their infection with the lyme borreliosis spirochaetes borrelia burgdorferi s.l. has taken place in canada since early 1990. ticks have been submitted from members of the public, veterinarians, and medical practitioners to provincial, federal, and university laboratories for identification, and the data have been collated and b. burgdorferi detected at the national microbiology laboratory. the locations of colle ...200616739422
the low seroprevalence of tick-transmitted agents of disease in dogs from southern ontario and quebec.infectious diseases caused by pathogens transmitted by ticks and other insect vectors are an important cause of morbidity and mortality in both dogs and humans throughout north america. the purpose of this study was to determine the seroprevalence of selected vector-transmitted pathogens in southern ontario and quebec. samples submitted to the vector borne disease diagnostic laboratory (vbddl) at the north carolina state university college of veterinary medicine were evaluated for antibodies to ...200617217089
[lyme disease. the carrier tick has settled in quebec]. 200920120304
active and passive surveillance and phylogenetic analysis of borrelia burgdorferi elucidate the process of lyme disease risk emergence in canada.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.201020421192
tracking the deer tick: emerging lyme disease threat in canada. 201020601318
harvested white-tailed deer as sentinel hosts for early establishing ixodes scapularis populations and risk from vector-borne zoonoses in southeastern canada.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 whether hunter-killed deer could act as sentinels for early establishing tick populations and for tick-borne pathogens. accounting for environmental charact ...201323540128
analysis of the human population bitten by ixodes scapularis ticks in quebec, canada: increasing risk of lyme disease.ixodes scapularis, the main vector of borrelia burgdorferi, the spirochetal agent of lyme disease, is expanding its range in southern canada and bringing risk to the public from lyme disease. the aims of this study were to (i) describe how risk of lyme disease in quebec, canada, has changed from 2008 to 2014 by analysis of the number of tick submissions, the geographic scope of ticks submitted and the prevalence of b. burgdorferi in ticks removed from people and submitted through the quebec pass ...201627650641
multi-criteria decision analysis as an innovative approach to managing zoonoses: results from a study on lyme disease in canada.zoonoses are a growing international threat interacting at the human-animal-environment interface and call for transdisciplinary and multi-sectoral approaches in order to achieve effective disease management. the recent emergence of lyme disease in quebec, canada is a good example of a complex health issue for which the public health sector must find protective interventions. traditional preventive and control interventions can have important environmental, social and economic impacts and as a r ...201324079303
lyme disease: first indigenous case in quebec. 19902317878
how far north are migrant birds transporting the tick ixodes scapularis in canada? insights from stable hydrogen isotope analyses of feathers.lyme disease is emerging in canada because of northward range expansion of the tick vector ixodes scapularis. it is hypothesised that i. scapularis feeding on passerine birds migrating north in spring are important in founding new i. scapularis populations leading to northward range expansion. however, there are no studies on how far north i. scapularis may be carried, only inferences from passive tick surveillance. we used stable hydrogen isotope (δ(2)h) analysis of rectrices collected from nor ...201526100493
exposure and preventive behaviours toward ticks and lyme disease in canada: results from a first national survey.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 bites of canadians in the five main targeted regions (british columbia, prairie provinces, ontario, quebec and the atlantic provinces). a national sur ...201727771334
the genetic signature of range expansion in a disease vector-the black-legged tick.monitoring and predicting the spread of emerging infectious diseases requires that we understand the mechanisms of range expansion by its vectors. here, we examined spatial and temporal variation of genetic structure among 13 populations of the lyme disease vector, the black-legged tick, in southern quebec, where this tick species is currently expanding and lyme disease is emerging. our objective was to identify the primary mode of tick movement into canada based on observed spatial and temporal ...201728173203
evaluating the submission of digital images as a method of surveillance for ixodes scapularis ticks.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 digital images/photographs, to the traditional specimen-based identification method used by the provincial public health laboratory in quebec, canada. forty ...201728345501
liver microbiome of peromyscus leucopus, a key reservoir host species for emerging infectious diseases in north america.microbiome studies generally focus on the gut microbiome, which is composed of a large proportion of commensal bacteria. here we propose a first analysis of the liver microbiome using next generation sequencing as a tool to detect potentially pathogenic strains. we used peromyscus leucopus, the main reservoir host species of lyme disease in eastern north america, as a model and sequenced v5-v6 regions of the 16s gene from 18 populations in southern quebec (canada). the lactobacillus genus was fo ...201728412525
practices of lyme disease diagnosis and treatment by general practitioners in quebec, 2008-2015.lyme disease (ld), a multisystem infection caused by the spirochete borrelia burgdorferi sensu stricto (b. burgdorferi), is the most reported vector-borne disease in north america, and by 2020, 80% of the population in central and eastern canada could live in ld risk areas. among the key factors for minimising the impact of ld are the accurate diagnosis and appropriate management of patients bitten by ticks. in this study, the practices of quebec general practitioners (gps) on ld diagnosis and m ...201728532428
complex population structure of borrelia burgdorferi in southeastern and south central canada as revealed by phylogeographic analysis.lyme disease, caused by the bacterium borrelia burgdorferi sensu stricto, is an emerging zoonotic disease in canada and is vectored by the blacklegged tick, ixodes scapularis. here we used bayesian analyses of sequence types (sts), determined by multilocus sequence typing (mlst), to investigate the phylogeography of b. burgdorferi populations in southern canada and the united states by analyzing mlst data from 564 b. burgdorferi-positive samples collected during surveillance. a total of 107 cana ...201525501480
adaptation and evaluation of a multi-criteria decision analysis model for lyme disease prevention.designing preventive programs relevant to vector-borne diseases such as lyme disease (ld) can be complex given the need to include multiple issues and perspectives into prioritizing public health actions. a multi-criteria decision aid (mcda) model was previously used to rank interventions for ld prevention in quebec, canada, where the disease is emerging. the aim of the current study was to adapt and evaluate the decision model constructed in quebec under a different epidemiological context, in ...201526295344
Widespread dispersal of Borrelia burgdorferi-infected ticks collected from songbirds across Canada.Abstract Millions of Lyme disease vector ticks are dispersed annually by songbirds across Canada, but often overlooked as the source of infection. For clarity on vector distribution, we sampled 481 ticks (12 species and 3 undetermined ticks) from 211 songbirds (42 species/subspecies) nationwide. Using PCR, 52 (29.5%) of 176 Ixodes ticks tested were positive for the Lyme disease spirochete, Borrelia burgdorferi s.l. Immature blacklegged ticks, Ixodes scapularis, collected from infested songbird ...201121864130
associations between ixodes scapularis ticks and small mammal hosts in a newly endemic zone in southeastern canada: implications for borrelia burgdorferi transmission.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. scapularis was similar to patterns reported previously in canada and the usa: nymphal activity peaked in spring while larval activity peaked in late su ...201122108010
indigenous lyme disease in quebec. 201121196590
bell palsy in lyme disease-endemic regions of canada: a cautionary case of occult bilateral peripheral facial nerve palsy due to lyme disease.lyme disease caused by the spirochete borrelia burgdorferi is a multisystem disorder characterized by three clinical stages: dermatologic, neurologic, and rheumatologic. the number of known lyme disease-endemic areas in canada is increasing as the range of the vector ixodes scapularis expands into the eastern and central provinces. southern ontario, nova scotia, southern manitoba, new brunswick, and southern quebec are now considered lyme disease-endemic regions in canada. the use of field surve ...201222967702
management of tick bites and lyme disease during pregnancy.lyme disease results from the bite of a black-legged tick, populations of which have now become established in parts of nova scotia, southeastern quebec, southern ontario from the thousand islands through the geographic regions on the north shore of lake ontario and lake erie, southeastern manitoba, and british columbia's lower mainland, fraser valley, and vancouver island. it takes more than 24 hours of attachment to transfer the spirochete borrelia burgdorferi to the bitten animal or human. th ...201223231847
investigation of the population structure of the tick vector of lyme disease ixodes scapularis (acari: ixodidae) in canada using mitochondrial cytochrome c oxidase subunit i gene sequences.genotyping of ixodes scapularis say (acari: ixodidae) ticks could enhance understanding of the occurrence and genotypes of i. scapularis-borne pathogens. we investigated the utility of mitochondrial (mt) cytochrome c oxidase subunit i gene (cox1) sequences as a tool for understanding the population structure of i. scapularis collected in canada, where we also investigated the geographic occurrence of different cox1 haplotypes. sequences obtained from 414 ticks were one of 55 unique haplotypes, m ...201323802450
passive surveillance for i. scapularis ticks: enhanced analysis for early detection of emerging lyme disease risk.lyme disease (ld) is emerging in canada because of the northward expansion of the geographic range of the tick vector ixodes scapularis (say). early detection of emerging areas of ld risk is critical to public health responses, but the methods to do so on a local scale are lacking. passive tick surveillance has operated in canada since 1990 but this method lacks specificity for identifying areas where tick populations are established because of dispersion of ticks from established ld risk areas ...201222493860
[lyme disease. a tick bite, no panic! emerging zoonoses in quebec]. 201121612076
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