Lyme disease is transmitted by the blacklegged tick (Ixodes scapularis) and the western blacklegged tick (Ixodes pacificus), and the range of these ticks is spreading, according to new research. Some ...

image: As surveillance for ticks and the disease-causing germs they spread improves, so does Americans’ access to knowledge about where the risk of tickborne disease is greatest. Experts at the U.S.

For permission requests, please contact NEJM Reprints at [email protected] Erythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the ...