Lyme disease is a mysterious, chronic condition that can lead to devastating symptoms, and a new study suggests the ticks that spread it may be increasing in numbers.
The report, published Wednesday in the Journal of Medical Entomology, found that the blacklegged tick and the western backlegged ticks, two vectors of Lyme, have now been reported in nearly half of all U.S. counties. The last comprehensive survey of the ticks’ presence was published in 1998, Science Daily reported.
By using a similar method to the one used in 1998, researchers at the Centers for Disease Control and Prevention (CDC) observed that the backlegged tick has been reported in more than 45 percent of counties compared to 30 percent in 1998. Compared to 1998, the backlegged tick is considered established in twice the number of counties today, Science Daily reported. The western backlegged tick, meanwhile, only increased from 3.4 to 3.6 percent of counties.