In the News
Johns Hopkins Magazine

A tracker for tickborne illness

Inspired by the popularity of the JHU COVID-19 dashboard, scientists from the Bloomberg School and the JHU School of Medicine teamed up to design a Lyme disease dashboard, hoping to draw public attention to this pervasive and often debilitating illness and to encourage additional research. ‘It’s a great example of how we can collaborate across the university,’ says John Aucott, an associate professor of medicine and director of the Johns Hopkins Lyme Disease Research Center, who is part of the project.
The Washington Post

The tick that makes people allergic to red meat is in D.C.

Our recent warm weather has reawakened ticks, and one type in particular is becoming more common in the D.C. area: the lone star tick. One bite from this tick can cause a life-long adverse reaction to eating red meat.
Research
Emerging Infectious Diseases

Effects of Tick-Control Interventions on Tick Abundance, Human Encounters with Ticks, and Incidence of Tickborne Diseases in Residential Neighborhoods, New York, USA

Tickborne diseases (TBDs) such as Lyme disease result in ≈500,000 diagnoses annually in the United States. Various methods can reduce the abundance of ticks at small spatial scales, but whether these methods lower incidence of TBDs is poorly understood. We conducted a randomized, replicated, fully crossed, placebo-controlled, masked experiment to test whether 2 environmentally safe interventions, the Tick Control System (TCS) and Met52 fungal spray, used separately or together, affected risk for and incidence of TBDs in humans and pets in 24 residential neighborhoods. All participating properties in a neighborhood received the same treatment. TCS was associated with fewer questing ticks and fewer ticks feeding on rodents. The interventions did not result in a significant difference in incidence of human TBDs but did significantly reduce incidence in pets. Our study is consistent with previous evidence suggesting that reducing tick abundance in residential areas might not reduce incidence of TBDs in humans.
BMC Public Health

Spatiotemporal trends and socioecological factors associated with Lyme disease in eastern Ontario, Canada from 2010–2017

Currently, there is limited knowledge about socioeconomic, neighbourhood, and local ecological factors that contribute to the growing Lyme disease incidence in the province of Ontario, Canada. In this study, we sought to identify these factors that play an important role at the local scale, where people are encountering ticks in their communities. We used reported human Lyme disease case data and tick surveillance data submitted by the public from 2010–2017 to analyze trends in tick exposure, spatiotemporal clusters of infection using the spatial scan statistic and Local Moran’s I statistic, and socioecological risk factors for Lyme disease using a multivariable negative binomial regression model. When adjusting for population counts, Lyme disease case counts increased with larger numbers of Borrelia burgdorferi-infected ticks submitted by the public, higher proportion of treed landcover, lower neighbourhood walkability due to fewer intersections, dwellings, and points of interest, as well as with regions of higher residential instability and lower ethnic concentration (Relative Risk [RR] = 1.25, 1.02, 0.67–0.04, 1.34, and 0.57, respectively, p < .0001). Our study shows that there are regional differences in tick exposure patterns in eastern Ontario and that multiple socioecological factors contribute to Lyme disease risk in this region.
Relevant Resources
Prevention and Symptoms
US Resources

Companion Animal Parasite Council

Parasite Prevalence Maps

California Department of Public Health

Lyme Disease in California ArcGIS StoryMap

Upstate Medical University

New York Tick Surveillance Dashboard

University of Rhode Island

TickEncounter

Cary Institute of Ecosystem Studies

Lyme & Tick-borne Disease

Columbia University

New York City Ticks

Bay Area Lyme Foundation

Citizen Science Tick Maps
Canadian Resources

Bishop’s University

eTick Public Tick Map

Companion Animal Parasite Council

Parasite Prevalence Maps

Canadian Lyme Disease Research Network

Research Projects
Resources
European Resources

European Centre for Disease Prevention and Control

Surveillance Atlas of Infectious Diseases
Tick Maps