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Oct 20, 2023 · Patterns of viral distribution are driven by the presence of the primary vector, the Rocky Mountain wood tick, Dermacentor andersoni. Infection prevalence in D. andersoni can range from 3% to 58% across the geographic distribution of the tick. Infection in humans can be severe and often presents with fever relapses but is rarely fatal.
Blazing the Trail. The first emigrant wagon train bound for California, known as the Bidwell-Bartleson Party, struck out from Independence, Missouri, in the spring of 1841. “Our ignorance of the route was complete,” admitted John Bidwell, a 21-year-old Pennsylvania schoolteacher who lent his name and leadership to the wagon company.
Dec 6, 2017 · The South Pass of the Oregon Trail. (James L. Amos/Corbis via Getty Images) The Oregon Trail was a roughly 2,000-mile route from Independence, Missouri, to Oregon City, Oregon, that was used by ...
Mar 28, 2024 · The Oregon Trail, which stretched for about 2,000 miles (3,200 km), flourished as the main means for hundreds of thousands of emigrants to reach the Northwest from the early 1840s through the 1860s. It crossed varied and often difficult terrain that included large territories occupied by Native Americans. From Independence it first traversed ...
Spotted fever group Rickettsia are a group of bacteria that can cause disease in humans, specifically Rocky Mountain spotted fever (RMSF) and Pacific Coast tick fever (PCTF). The bacteria that cause RMSF and PCTF are transmitted by the bite of an infected tick. Symptoms of these diseases usually include a fever and rash ("spots").
Marshall decided to build a sawmill on the South Fork of the American river, about 40 miles from Sutter's home. Marshall discovered a gold nugget on January 24, 1848, while at the sawmill. He and his men found more gold nearby. Both Marshall and Sutter tried to keep things quiet, but soon word leaked out. Gold fever quickly became an epidemic.
Jan 17, 2018 · Bettmann /Getty Images. The Klondike Gold Rush, often called the Yukon Gold Rush, was a mass exodus of prospecting migrants from their hometowns to the Canadian Yukon Territory and Alaska after ...
