Ticks & Mosquitoes


Mosquito bites can be itchy and annoying, but they can also spread diseases such as dengue, chikungunya, or Zika. Talk to your healthcare provider as soon as possible if you think you might have a mosquito-born disease.


Ticks are found throughout Maryland. The most common ticks in Maryland are the black-legged tick, the American dog tick, and the lone star tick. For more information about the kinds of ticks in Maryland, visit Ticks in Maryland. Not every tick bite causes disease, but some ticks can infect humans. Some tick-borne diseases can be serious. Here is a list of tick-borne diseases in Maryland. Talk to your healthcare provider as soon as possible if you think you might have a tick-born disease. 

Check out the tips below to keep yourself and your family healthy.

  1. Before going outside
  2. When inside
  3. In your yard
  4. If bitten
  5. Resources

Wear long sleeve shirts and pants; tuck shirt into your pants and pants into your socks if hiking in fields or woods. Light colors are best.

If using sunscreen, apply sunscreen first, then repellent. Products that combine sunscreen and bug spray don’t work as well.

Use an EPA-registered insect repellent with approved active ingredients:

  • DEET (20-30%)
  • Picardin, also known as KBR 3023, Bayrepel, and icaridin
  • IR3535
  • Oil of Lemon Eucalyptus (OLE) or para-menthane-diol (PMD)*

When used as directed, these repellents are safe for pregnant and breast-feeding women and children. Do not use repellent on babies younger than 2 months old.  *Do not use OLE or PMD on children under 3.

Use this tool to find the repellent that’s right for you.

If you spend a lot of time outside, consider treating clothes and gear with permethrin or buying treated gear.