Bacterium tularense was first discovered and named by Dr. George W. McCoy of the U. S. Public Health Service in 1912, after he had isolated it from ground squirrels in Tulare County, Calif. In 1920, Dr. Edward Francis of the Public Health Service discovered that jack rabbits in the states around Great Salt Lake were infected with this disease, and that the human disease known as deer-fly fever was transmitted to man by the bite of a blood-sucking fly, which had been infected previously by biting the diseased jack rabbit.
Now Dr. J. R....
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