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  2. May 7, 2019 · 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. Transmission. Signs and Symptoms. Diagnosis and Testing. Prevention. Treatment. For Healthcare Providers.

    • How Do I Take Care of Myself If I Have Rocky Mountain Spotted Fever?
    • When Should I See My Healthcare Provider About Rocky Mountain Spotted Fever?
    • What Questions Should I Ask My Doctor?

    If your provider is treating you for Rocky Mountain spotted fever, make sure you take all of your medicine as prescribed. If you stop taking antibiotics before the end of the course, you may get sick again. Your provider can tell you how to manage your symptoms at home best. RMSF can get worse quickly. Call your provider right away if you have new ...

    If you have a tick bite or have been in an area with ticks and have symptoms of RMSF, see your healthcare provider right away. If you have a tick bite but don’t have any symptoms, you don’t need to see your provider yet — taking antibiotics when you’re not sick won’t help prevent RMSF.

    How do I take my medication?
    What new or worsening symptoms should I look out for?
    How soon should I feel better?
    When should I follow up with you?
  3. Agent. Rickettsia rickettsii. RMSF is most often transmitted by the American dog tick in the Eastern, Central and Western United States; by the Rocky Mountain wood tick in the Rocky Mountain states; and by the brown dog tick in the Southwestern United States, along the U.S.-Mexico border.

  4. Feb 19, 2019 · Signs and Symptoms. On This Page. Rash. Infection in Children. Bloodwork. Long-term Effects of RMSF. Rocky Mountain spotted fever, (RMSF) is the most severe rickettsiosis in the United States. RMSF is a rapidly progressive disease and without early administration of doxycycline can be fatal within days.

  5. RMSF is caused by a bacterium that is spread to people by the bite of an infected tick. In different parts of the U.S., these ticks can transmit the RMSF bacteria: American dog tick. Rocky Mountain wood tick. Brown dog tick. Lone star tick. Who is at risk for Rocky Mountain spotted fever?

  6. Prevention tips. What is Rocky Mountain spotted fever? Rocky Mountain spotted fever (RMSF) is a bacterial infection spread by a bite from an infected tick. It causes vomiting,...

  7. Jul 17, 2023 · Etiology. Rickettsia rickettsii, the most well-described and most lethal of the spotted group rickettsiae, causes Rocky Mountain spotted fever (RMSF). It is a coccobacillary, obligate, intracellular organism that accidentally infects human hosts after a bite with an infected tick vector.