In a biological sciences laboratory at the University of Manitoba, Professor Steve Whyard is seen caring for a colony of yellow fever mosquitoes. These lab-bred mosquitoes are being studied by Whyard’s team and other scientists globally to find ways to manage their population and curb the spread of diseases without resorting to pesticides.
As summer approaches and mosquito activity peaks in Canada, public health agencies in the U.S. and Mexico are ramping up surveillance efforts in host cities due to the influx of visitors for the FIFA World Cup. While these agencies are expanding mosquito monitoring, Canada is maintaining its existing seasonal tracking methods.
In Whyard’s lab, the mosquitoes are fed a special diet containing “RNA cocktails,” designed to sterilize the insects effectively by suppressing genes related to sperm production in males and female development in larvae. This approach aims to prevent the mosquitoes from reproducing without harming other insects.
The focus on controlling mosquito populations is crucial, given the low infection rates of mosquito-borne diseases in Canada. West Nile virus remains the most prevalent, with Health Canada reporting 295 locally-acquired cases and nine deaths in 2025. Other diseases like yellow fever, dengue fever, Zika, and chikungunya are primarily acquired during travel.
Experts warn that climate change and environmental changes, such as deforestation, are expanding the geographical range of mosquitoes, particularly the Asian tiger mosquito capable of transmitting various diseases. This shift poses a growing threat to public health.
In the ongoing battle against mosquitoes, innovative solutions are emerging worldwide. For instance, a Chinese startup has developed a portable device using lasers to target and eliminate mosquitoes without chemical pesticides. Genetic modifications, such as sterilizing or altering mosquitoes, are also being explored, with initiatives like the Gates Foundation’s efforts to combat mosquito-borne diseases.
While these advancements offer hope in mosquito control, challenges related to genetic modifications, regulatory approval, and ethical considerations remain. Public education and engagement are crucial in navigating the complexities of using advanced technologies to combat mosquito-borne diseases.
In Canada, the Public Health Agency is engaging citizens in monitoring mosquito populations through initiatives like the Tiger Mosquito Citizen Science study. By involving local communities in tracking invasive species, researchers aim to gather real-time data to inform mosquito control strategies.
Despite advancements in mosquito management technologies, traditional methods like larvicide spraying continue to be relied upon in regions like Winnipeg, where disease-carrying mosquitoes are less prevalent. The economic feasibility and urgency of mosquito control efforts in Canada are influenced by the relatively low disease burden compared to other regions.
