. Biology and human life. Biology. INSECTS IN RELATION TO DISEASE 325 the slightest connection between the vomits and excretions of the patients and the infection of new cases. In the other building a volunteer allowed himself to be stung by a mosquito that had drawn blood from a patient some two weeks earlier. The volunteer had been in quarantine for two weeks, to make sure that he was not infected at the time he first came into the building. The bedding and other utensils were thoroughly sterilized. On the fourth day after being stung he developed symptoms of the disease. Other. Fig. 154. Ca
. Biology and human life. Biology. INSECTS IN RELATION TO DISEASE 325 the slightest connection between the vomits and excretions of the patients and the infection of new cases. In the other building a volunteer allowed himself to be stung by a mosquito that had drawn blood from a patient some two weeks earlier. The volunteer had been in quarantine for two weeks, to make sure that he was not infected at the time he first came into the building. The bedding and other utensils were thoroughly sterilized. On the fourth day after being stung he developed symptoms of the disease. Other. Fig. 154. Camp Lazear In this building was conducted that part of the yellow-fever experiments which proved that the disease is not transmitted by infected clothing etc. The cabin consisted of a room, 14 by 20 feet, with two small windows facing south, closed with wire screens. Heavy wooden shutters excluded the sunlight. Entrance was through a small vesti- bule on the same side as the windows, protected by a wooden door and a screen door and separated from the main room by a screen door, to make perfectly certain that no mosquitoes could get in. This house was kept closed during the daytime and had a temperature of from 92° to 95° F. It was occupied for twenty nights by three American volunteers, and the test was repeated twice volunteers, on the other side of the screen, breathing the same air but not stung by mosquitoes, remained unaffected. Ten or more individuals contracted yellow fever as a result of receiving bites from mosquitoes that had previously bitten sick persons, but not one who stayed on the other side of the screen was infected. In the course of the experiments Dr. Carroll and Dr. Lazear also became sick, the latter dying as a result. The parasite that causes yellow fever was discovered in 1918 by the Japanese scientist Noguchi, working at the Rockefeller Please note that these images are extracted from scanned page images that may have been digitally enhance
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology
