Lyme Disease Info
Lyme disease is transmitted by ticks infected with a specific bacterium. It is characterized by a rash called "erythema migrans," but other symptoms are possible too. Treatment generally involves antibiotics. If you live in an area where ticks are common, preventing Lyme disease is crucial. This involves removing ticks promptly and applying insect repellant, among other things.
(Click Lyme Disease for more info on this topic, including how a diagnosis is made, if you need to test any ticks you find, and additional symptoms to be aware of.)