“Over time, the number of counties identified as having high incidence of Lyme disease in the northeastern states increased more than 320 percent,” researchers wrote in the report. They also noted that the disease is appearing in some states for the first time ever.
Cases in the US remain concentrated in in the Upper Midwest and the Northeast, but more parts of those regions are now considered to be at high risk for infection. There are now 260 counties where the number of Lyme disease diagnoses is at least twice that expected for the population as a whole, up from 130 a decade earlier, the report published Wednesday said.
Read more: http://www.rt.com/usa/310132-lyme-disease-spread-cdc/