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Feb 19, 2024 · This map, produced in 1944, shows major “tropical diseases” and where they occur in the world. A stylized image of the vector or symptoms of the disease is drawn over each afflicted region. Along the bottom of the map is a key describing which image refers to which disease, with a short block of text giving more background about each ...
Rocky Mountain spotted fever, form of tick-borne typhus first described in the Rocky Mountain section of the United States, caused by the bacterium Rickettsia rickettsii. Although historically known from the Rocky Mountain region, the disease occurs throughout North America and in Central and South America.
- The Editors of Encyclopaedia Britannica
The term mountain fever is apparently a catch-all term referred to in many western histories. One histori- cal writer, George Stewart, speaks of this condition as "that vague disease called 'mountain fever,' which seems to have meant any fever you had when you were in the mountains."l Additionally, Dr. Ralph T. Richards, in his
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Rocky Mountain spotted fever (RMSF), or "black measles," fatal in eighty percent of adult cases, plagued early-day settlers in the Bitterroot Valley. In 1906 Howard Ricketts identified ticks as carriers of this disease. State efforts to control the insects were only partially successful, and in 1921 the U.S. Public Health Service agreed to fund a vaccine development program. An ...
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Early map of the Bitterroot valley. Area in red shows where spotted fever infection occurred.
This map, produced in 1944, shows major “tropical diseases” and where they occur in the world. A stylized image of the vector or symptoms of the disease is drawn over each afflicted region. Along the bottom of the map is a key describing which image…
History. Rocky Mountain spotted fever (or "black measles" because of its characteristic rash) was recognized in the early 1800s, and in the last 10 years of the 1800s (1890–1900) it became very common, especially in the Bitterroot Valley of Montana.
