Rocky Mountain spotted fever Contrary to the name "Rocky Mountain," most recent cases have been reported in the eastern United States, including North and South Carolina, Virginia, Maryland, Georgia, Tennessee, and Oklahoma. Most cases occur in the spring and summer with about 1,000 cases reported per year. Most of the reported cases have been in children.
ROCKY MOUNTAIN SPOTTED FEVER Rocky Mountain spotted fever is an acute infectious disease transmitted to humans by the bite of an infected tick. The disease occurs throughout the United States during months when ground temperatures reach 40 degrees Fahrenheit or more and ticks are active.