Read as much as you want on BostonGlobe.com, anywhere and anytime, for just 99¢.

Lyme disease more common than previously thought

Transmission from ticks to people

Lyme disease is caused by a spirochete, a corkscrew-shaped bacteria called Borrelia burgdorferi, which enters humans through a bite from an infected deer tick.

You have reached the limit of 5 free articles in a month

Stay informed with unlimited access to Boston’s trusted news source.

  • High-quality journalism from the region’s largest newsroom
  • Convenient access across all of your devices
  • Today’s Headlines daily newsletter
  • Subscriber-only access to exclusive offers, events, contests, eBooks, and more
  • Less than 25¢ a week