While mosquito numbers were significantly reduced during last month’s emergence, early signs suggest another event—possibly larger than the last—is developing.

GRAND CAYMAN, Cayman Islands (3 May 2025) – Teams from the Mosquito Research and Control Unit (MRCU) are working across the Cayman Islands this weekend to stay ahead of a potential surge in mosquito activity.

While mosquito numbers were significantly reduced during last month’s emergence, early signs suggest another event—possibly larger than the last—is developing. In response, MRCU teams are actively collecting data and monitoring key areas to guide targeted control measures.
This afternoon (3 May), MRCU conducted surveillance and research in the Barkers area, where each team member received an average of 50 bites per minute. A short video clip<https://youtu.be/iHH018dPgj8> from the site highlights just how intense the conditions can be for our staff as they carry out essential work to help keep mosquito populations low.

“This is the reality of what our teams face on the ground,” said Kevin Watler, Public Education and Outreach Officer. “Our staff are out there—weekends and holidays included—collecting data and applying treatments to protect the public. We think it’s important for people to see what goes into keeping mosquito numbers down, especially during mosquito season.”

With the rainy season now underway, conditions are ideal for mosquito breeding—making this an especially critical time for mosquito control. In the coming days, residents can expect to see an increase in both aerial operations and ground fogging truck activity as MRCU intensifies efforts to reduce mosquito numbers to more comfortable levels.

MRCU uses a data-driven and environmentally sensitive approach to mosquito control, combining field surveillance with scientific research to guide treatments. By identifying breeding hotspots early, the team can act quickly to suppress mosquito populations before they spread more widely.
Residents are reminded that mosquito control is a shared responsibility. Clearing standing water from containers, checking gutters, and properly covering water tanks are just a few of the simple steps that make a big difference at home.

To stay informed about our activities and mosquito control tips, follow MRCU on social media<https://linktr.ee/CaymanMRCU>, or subscribe to our WhatsApp Channel<https://whatsapp.com/channel/0029Vajvr1MCXC3QGFJu1R12>.

Together, we can keep mosquito numbers as low as possible.
For more information, visit www.gov.ky/mrcu<https://www.gov.ky/mrcu/> or contact MRCU at [email protected]<mailto:[email protected]>.
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About the Mosquito Research and Control Unit (MRCU):
The MRCU is dedicated to safeguarding the health and well-being of the Cayman Islands through rigorous mosquito research and control measures and public education. Utilising a science-based approach, MRCU’s team of experts works year-round to monitor, manage and reduce mosquito populations, particularly those that pose a threat to human health.