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This gentleman had not lived out of England, where there is now no acute malaria. He had been a perfectly healthy, strong man. In a few days following the bites of the infected mosquitoes, he had a typical attack of malarial fever. Journal Linnaean Society, London, 1879, XIV, 304-311. Medical News, Philadelphia, 1889, LV, 689-693, and monograph with Kilborne, Washington, 1893.
Previous to this time Kilborne and Salmon proved that the cattle tick was essential to the spread and production of the disease. A further study of the life history of the tick resulted in the discovery that it could not mature unless it became a parasite of horses, mules, or cattle.
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