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  2. Rocky Mountain spotted fever (RMSF) is a bacterial infection spread by a bite from an infected tick. It causes vomiting, a sudden high fever around 102 or 103°F, headache, abdominal pain, rash,...

  3. May 7, 2019 · One of the deadliest tickborne diseases in the Americas. Learn more. 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.

  4. Aug 25, 2022 · Rocky Mountain spotted fever (RMSF) is an illness you get from the bacteria Rickettsia rickettsii ( R. rickettsii). It spreads through tick bites. Symptoms start out similar to many other illnesses, including headache, fever and rash. But if not treated right away, RMSF can be life-threatening.

  5. Feb 19, 2019 · Figure 1. Late stage rash in a patient with Rocky Mountain spotted fever. Rash is a common sign in people who are sick with RMSF. Rash usually develops 2-4 days after fever begins. The look of the rash can vary widely over the course of illness. Some rashes can look like red splotches and some look like pinpoint dots.

  6. 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.

  7. Sore throat. Stomachache. Nausea or vomiting. Diarrhea. Body aches. Sensitivity to light. RMSF is a serious illness that needs treatment as soon as possible. Death has occurred in untreated cases of RMSF. Symptoms of RMSF may look like other conditions or medical problems. See a healthcare provider for diagnosis.

  8. Pathophysiology. Symptoms and Signs. Diagnosis. Treatment. Prevention. Key Points. More Information. Rocky Mountain spotted fever (RMSF) is caused by Rickettsia rickettsii and transmitted by ixodid ticks. Symptoms are high fever, severe headache, and rash. (See also Overview of Rickettsial and Related Infections .)