Ticks, such as the American dog tick and the Brown dog tick can transmit Rickettsia rickettsii, which causes Rocky Mountain Spotted Fever. The Black Legged Tick is responsible for Lyme Disease. Te Gulf Coast tick and Lone Star tick also transmit disease.

The most common illness spread by ticks in Arkansas is by far Rocky Mountain Spotted Fever, a bacterial disease that is very serious, and can be deadly if left untreated.

2019 is predicted to be a very heavy tick year, possibly the worst in many years.