Lyme disease, spread via the bite of an infected tick, has expanded into states that border those with a historically high incidence, according to a recent CDC report on surveillance data for 2008-2015.
During that period, the CDC received reports of 275 589 cases of Lyme disease in the United States, the most commonly reported vector-borne disease in the country. Of the total case reports, approximately 209 000—from 48 states and the District of Columbia—were laboratory confirmed. Recent estimates suggest the actual US incidence of Lyme disease could be much higher than the number of reported cases, the authors noted.
Rubin R. Lyme Disease Spreading Beyond States With Historically High Incidence. JAMA. 2017;318(24):2420. doi:10.1001/jama.2017.19129