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Rocky Mountain spotted fever (RMSF) is one of about a dozen spotted fever illnesses found in the Americas, Europe, Asia and Australia. All are caused by bacteria belonging to the genus Rickettsia, a group of pleomorphic (shape-changing), non-motile microbes that replicate only inside of eukaryotic host cells.
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 ...
Jan 10, 2023 · Rocky Mountain spotted fever (RMSF) is an illness caused by bites from ticks carrying the Rickettsia rickettsii (R. rickettsii) bacterium. The condition can cause severe symptoms like high fevers and tissue death. Prompt treatment is the best way to avoid serious complications.
Jul 14, 2019 · Rocky Mountain spotted fever is the most dangerous of all of the spotted fevers. If left untreated, the disease can be fatal in 20 percent of cases or more (in comparison, Lyme disease is ...
Despite its name, Rocky Mountain spotted fever (RMSF) occurs in practically all of the United States and throughout Central and South America. Small-vessel vasculitis can cause serious illness affecting the central nervous system, lungs, heart, kidneys, liver, and spleen; untreated mortality is about 20%. Symptoms (severe headache, chills ...
Feb 4, 2012 · Rocky Mountain Spotted Fever. February 4, 2012. Rocky Mountain spotted fever (RMSF) is caused by the bacterium Rickettsia rickettsii. Symptoms include fever, headaches, myalgia; characteristic spotted rash* begins on wrists, ankles, palms, and soles, and may be absent early in the disease. Treatment is usually doxycycline.
Mar 25, 2024 · Rocky Mountain spotted fever (RMSF) is a bacterial illness caused by a bite from an infected tick. Symptoms include high fever and widespread rash. Symptoms include high fever and widespread rash. In the United States, there are 4,000–6,000 reports of tick-borne spotted fevers, including RMSF, each year.
