Rocky Mountain spotted fever is a serious tickborne illness which can be deadly if not treated early. Rocky Mountain spotted fever is spread by several species of ticks in the United States, including: American dog tick (Dermacentor variabilis) (Figure 1), widely distributed east of the Rocky Mountains and in portions of the Pacific Coast.
What is Rocky Mountain spotted fever? Rocky Mountain Spotted fever (RMSF) is an infection caused by a type of bacteria carried by ticks. Despite its name, cases of RMSF have been reported throughout the United States. What causes Rocky Mountain spotted fever? You can catch RMSF by being bitten by an infected tick.
Rocky Mountain spotted fever (RMSF) is a bacterial infection. People get it from the bite of an infected tick. People get it from the bite of an infected tick. Most infections happen in the spring and summer, when ticks are active.
Rocky Mountain Spotted Fever. Rocky Mountain spotted fever (RMSF) is the most common rickettsial infection in the U.S. It can range from a mild illness to a fatal one. Initial symptoms typically include high fever, severe headache, abdominal pain (with or without vomiting), and muscle pain.
Rocky Mountain spotted fever (RMSF) is considered the most potentially severe form of the spotted fevers. The onset of symptoms typically occurs approximately two to 14 days (with an average of seven days) after having been bitten by a tick carrying the R. rickettsii bacterium.
Ricketts identified the causative agent of Rocky Mountain spotted fever. Among the first was Dr. Howard Ricketts, a young pathologist from the University of Chicago, who in 1906, showed that the disease was transmitted by the bite of the Rocky Mountain wood tick ( Dermacentor andersoni ).
The patient's rash is a major diagnostic sign of Rocky Mountain spotted fever (RMSF). Image courtesy of Bal AK, Kairys SW. Kawasaki disease following Rocky Mountain spotted fever: a case report.
Rocky Mountain spotted fever is characterized by a sudden onset of moderate to high fever (which can last for two or three weeks), severe headache, fatigue, deep muscle pain, chills and rash. The rash begins on the legs or arms, may include the soles of the feet or palms of the hands and may spread rapidly to the trunk or the rest of the body.
The bacteria that causes RMSF, Rickettsia rickettsia, is transmitted by the bite of an infected American dog tick, Dermacentor variabilis, or Rocky Mountain wood tick, D. andersoni. These ticks are found throughout the state and prefer woodland areas, medium height grasses and shrubs between wetlands and woods, and sunny or open areas around woods.
Rocky Mountain spotted fever (RMSF) is a bacterial disease spread by ticks. It typically begins with a fever and headache , which is followed a few days later with the development of a rash .  The rash is generally made up of small spots of bleeding and starts on the wrists and ankles.