Vector-Borne Diseases
Mosquitoes, ticks, and fleas that spread germs (pathogens) are called vectors
What is a Vector-Borne Disease?
Vector-borne diseases are human illnesses caused by parasites, viruses, and bacteria that are transmitted by vectors. A vector in the United States is most often a mosquito, tick, or flea. If you become sick after being bitten by a vector, you may have a vector-borne illness.

What are the different Vector-Borne Diseases?
There are a lot of vector-borne diseases. Some of the more common in our area include Eastern Equine Encephalitis, West Nile Virus, and Lyme.
For information on tick-borne diseases, such as Lyme, visit our Tick Testing and Information page.
How Can I Prevent Vector-Borne Disease?
- Use an Environmental Protection Agency (EPA)-registered insect repellents. When used as directed, these repellents are proven safe and effective, even for people who are pregnant or breastfeeding.
- Wear loose-fitting, long clothing to protect yourself from mosquito and tick bites.
- Treat clothing and gear with 0.5% permethrin. Watch the video, What You Need to Know About Permethrin.
For more prevention strategies, visit the CDC website.


