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  1. May 7, 2019 · RMSF. One of the deadliest tickborne diseases in the Americas. Rocky Mountain spotted fever (RMSF) is a bacterial disease spread through the bite of an infected tick. Most people who get sick with RMSF will have a fever, headache, and rash. RMSF can be deadly if not treated early with the right antibiotic.

  2. Although historically known from the Rocky Mountain region, particularly the U.S. states of Idaho and Montana, today Rocky Mountain spotted fever is most common on the eastern coast of the United States and has been found in every state and other parts of North America. It also is endemic in Central and South America.

    • The Editors of Encyclopaedia Britannica
  3. Jul 8, 2014 · Rocky Mountain spotted fever is a tickborne disease first recognized in 1896 in the Snake River Valley of Idaho. It was originally called “black measles” because of the look of its rash in the late stages of the illness, when the skin turns black.

  4. Rocky Mountain spotted fever is a rickettsial disease. Epidemiology of RMSF. RMSF is limited to the Western Hemisphere. Initially recognized in the Rocky Mountain states, it occurs in practically all of the United States and throughout Central and South America.

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  6. Rocky Mountain spotted fever is probably the most common rickettsial infection in the United States. It was first recognized in the Rocky Mountain states but occurs throughout most of the continental United States. It is most common in the southeastern and south central United States (North Carolina, Oklahoma, Arkansas, Tennessee, and Missouri).

  7. Jul 12, 2018 · Those infected with the tick-borne disease may begin to show symptoms 3 to 12 days after being infected. Symptoms may include: High fever. Chills. Severe headache. Muscle aches. Nausea and vomiting. Confusion or other neurological changes. "Rocky Mountain spotted fever is another tick-borne disease that residents of Wisconsin and other states ...

  8. Rocky Mountain spotted fever (RMSF) is a severe tick-borne rickettsial illness in the United States (1). RMSF is caused by Rickettsia rickettsii, is an intracellular bacterium and a member of the spotted fever group Rickettsia (SFGR). RMSF was first reported in the late 1890’s and is endemic to North, Central and South America.