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Apr 24, 2024 · Definition. Rocky Mountain spotted fever (RMSF) is a systemic vasculitis caused by infection with Rickettsia rickettsii, a tickborne, gram-negative, intracellular bacterium. [ 1] . Rickettsia rickettsii is one of the spotted fever group rickettsiae and is closely related to the other group members by genetic and antigenic characteristics.
Symptoms and Signs of RMSF. The incubation period for Rocky Mountain spotted fever averages 7 days but varies from 3 to 12 days; the shorter the incubation period, the more severe the infection. Onset is abrupt, with severe headache, chills, prostration, and muscular pains. Fever reaches 39.5 to 40° C within several days and remains high (for ...
Key points about Rocky Mountain spotted fever. RMSF is caused by a bacterium that is spread to people by the bite of an infected tick. Symptoms include a rash, fever, headache, decreased appetite, chills, sore throat, confusion, stomachache, nausea or vomiting, diarrhea, body aches, and sensitivity to light. Treatment includes antibiotics and ...
Dec 29, 2021 · Other symptoms of Rocky Mountain spotted fever include: Lungs—Rapid breathing, severe shortness of breath, bluish tint to fingernails and lips. Liver and gastrointestinal tract—Abdominal pain, nausea, vomiting, diarrhea and jaundice. Brain—Confusion, lethargy, difficulty walking, extreme drowsiness, seizures and coma.
May 18, 2021 · Rocky Mountain Wood Tick. Formally known as Dermacentor andersoni, the Rocky Mountain wood tick is brown with a white shield. As the name suggests, it is most common in the Rocky Mountain states and prefers scrubland in elevations over 4,000 feet. Diseases that it can transmit to dogs include Rocky Mountain spotted fever and tick paralysis.
Rocky Mountain Spotted Fever (RMSF) is a disease caused by the bacteria Rickettsia rickettsii. The bacteria are transmitted to humans through the bite of an infected tick, most commonly the American dog tick (Dermacentor variabilis) or Rocky Mountain wood tick (Dermacentor andersoni). The disease was first recognized in the Rocky Mountain area ...
