Ticks

It's getting "tickier"

Illustration: Rebecca Zisser/Axios

The spread of ticks in the U.S. — and a rise in cases of the diseases they carry — is putting the tiny tick in the sights of Congress and spurring calls for better tools to track and control them.

Why it matters: Ticks spread bacteria that cause Lyme disease and more than a dozen other pathogens. Nearly 43,000 confirmed and probable cases of Lyme disease were reported in the U.S. in 2017 — triple the number in the late 1990s — but the CDC suspects the actual number of cases each year could be about 300,000.