Early residents of the Bitterroot Valley called the disease “black measles,” “blue disease,” “black typhus,” or just “fever.” RMSF appeared in the valley after the slope had been cleared of trees for timber to make railway ties for the Northern Pacific Railroad, leaving the perfect environment for ticks. In 1902, the State of Montana asked scientists to investigate the mysterious disease. In less than 22 years, researchers identified what caused the disease, how it was transmitted to humans, and created a life-saving vaccine. This was nearly a miracle in an age with little knowledge of microbiology and only basic technology. |