The tick that causes Lyme disease can also spread babesiosis—and researchers fear doctors in the mid-Atlantic don’t know ...

The single-celled parasite Entamoeba histolytica infects 50 million people each year, killing nearly 70,000. Usually, this wily, shape-shifting amoeba causes nothing worse than diarrhea.

The U.S. Department of Agriculture said May 11 that it is suspending imports of livestock through Mexico because of New World Screwworm threats.