The latest news on Lyme disease
Experts expect ehrlichiosis, like Lyme disease, will spread across U.S.
A little-known illness they're spreading can be fatal, especially to people with a weak immune system
Things you can do to ward off infected ticks
Strong evidence suggests that the central nervous system is involved in both conditions
The discovery may eventually speed effort to prevent, treat it, researchers say
It's spread by infected ticks
Experts dismiss need for long-term antibiotic therapy, but opponents call decision a 'rubber stamp'
Researcher describes finding as a theory that still needs testing
Risk is highest from April to October
Even in winter months, doctors diagnose the tick-borne illness.