Using Mouse Bait with Tick Pesticide Significantly Reduces Infected Tick Populations in Field Trials

Researchers at the University of Montreal have demonstrated that deploying bait containing a tick pesticide on mice can decrease the density of infected ticks by approximately 39% in real-world settings. Mice are key hosts for bacteria that cause Lyme disease, and ticks that feed on them can acquire and transmit the pathogen. By targeting mice with bait laced with fluralaner, an insecticide commonly used for pets, the study aimed to interrupt the transmission cycle of Lyme disease.

The project involved extensive fieldwork across different sites in the Eastern Townships, including Farnham and Bromont, which are high-risk areas for Lyme disease. During the spring to autumn seasons from 2019 to 2022, bait was strategically laid out in private yards and along public trails to attract mice. While mice remained unharmed after ingesting the bait, ticks that bit the mice were effectively killed. Control sites without bait were included for comparison.

Findings from the four-year study indicate that the baiting strategy not only reduced overall tick density but also lowered the proportion of ticks carrying Lyme disease. Interestingly, the influence of the bait extended beyond the immediate area, affecting tick populations in the surrounding zones.

Despite promising results, experts urge caution in interpreting these findings. A reduction in infected ticks does not automatically translate into decreased human cases, as other factors influence disease transmission. The researchers emphasize that personal protective measures continue to be vital in Lyme disease prevention.

This innovative approach forms part of a comprehensive strategy that includes public awareness initiatives to foster preventive behaviors. Future studies are planned to combine various interventions, including ecological methods such as managing deer populations, to further curb the spread of Lyme disease.

This research highlights the potential of environmental interventions in vector control and underscores the importance of integrated efforts to combat tick-borne illnesses.