Ticks That Can Carry Lyme Disease Are Spreading Across the US

Here a tick, there a tick, everywhere a tick, tick: The critters that can carry Lyme disease are now more widespread in the U.S. than ever before, according to new research. In the study, experts mapped the distribution of Lyme-disease-carrying ticks and found that these ticks are ranging farther north than before, and are now living in nearly 50 percent of U.S. counties. There are two tick species that can carry the Borrelia burgdorferi bacteria that cause Lyme disease: the blacklegged tick, al