Living on the beautiful Treasure Coast means enjoying our lush, tropical climate year-round. However, a recent study conducted right here in Vero Beach serves as a timely reminder that our outdoor lifestyle requires a bit of vigilance. While Indian River County remains entirely free of locally acquired dengue fever, the specific mosquito species responsible for transmitting the virus is surprisingly prevalent in our local suburban yards.
According to recent data from the Florida Department of Health, the state has seen nearly 500 dengue cases this year, with over 250 of those infections acquired locally within Florida. While the majority of these local cases have been centered in Hillsborough County, neighboring areas like Palm Beach and St. Lucie counties have reported travel-associated cases, with Palm Beach also noting one local case. Indian River County has fortunately reported zero locally acquired cases.
Despite this good news, researchers at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Florida Medical Entomology Laboratory in Vero Beach made an unexpected discovery while monitoring local properties.
Through a first-of-its-kind study utilizing a smartphone-based “Bite Diary,” researchers collected 3,788 female mosquitoes from 78 yards in Indian River County. They found surprisingly high numbers of Aedes aegypti—the primary species associated with worldwide dengue transmission—rather than the expected Asian tiger mosquito.
The Vero Beach research team discovered that the sheer number of mosquitoes in a given yard did not necessarily dictate how often a resident was bitten. Instead, lifestyle and behavior played the biggest roles. Of the bites reported through the app, nearly 93 percent occurred outdoors, with the vast majority happening right at home. The peak time for mosquito encounters was between 5 p.m. and 9 p.m., aligning perfectly with popular local evening activities like tending to the garden or taking the dog for a walk.
Dengue fever is only spread through the bite of an infected mosquito and cannot be transmitted directly from person to person. Because the Aedes aegypti mosquito is well-established in Indian River County, health and entomology experts emphasize the importance of proactive backyard control and personal bite prevention to keep our community safe. Symptoms of the virus can include severe muscle and joint pain, fever, nausea, rash, and pain behind the eyes.
To protect yourself and your family while enjoying the outdoors in Vero Beach, local health officials recommend the following practical steps:
- Use EPA-registered insect repellent: Apply a proven repellent before heading outside, especially during the late afternoon and evening hours.
- Dress appropriately: Wear long sleeves and pants when practical to minimize exposed skin.
- Secure your home: Routinely check and repair any damaged window and door screens to keep mosquitoes outside.
- Eliminate standing water: Consistently dump out water that gathers in everyday yard items like buckets, flowerpots, children’s toys, old tires, and pool covers, which serve as primary mosquito breeding grounds.
By taking these simple, proactive precautions, Vero Beach residents can continue to safely enjoy the stunning outdoor living that makes the Treasure Coast so special.
