. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. AEDES CALOPUS AND YELLOW FEVER 443 enough individuals do this to make it necessary to look for breeding places more than three or four hundred yards from the infested locality. The conveyance of mosquitoes in trains, boats, etc., must, however, be taken into account. The effect of a,nti-Anopheles campaigns on the prevalence of malaria is discussed in Chap. IX, pp. 165-167. Mosquitoes and Yellow Fever Following upon the heels of the discovery of the relation of mosquitoes to malaria, and second only to i
. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. AEDES CALOPUS AND YELLOW FEVER 443 enough individuals do this to make it necessary to look for breeding places more than three or four hundred yards from the infested locality. The conveyance of mosquitoes in trains, boats, etc., must, however, be taken into account. The effect of a,nti-Anopheles campaigns on the prevalence of malaria is discussed in Chap. IX, pp. 165-167. Mosquitoes and Yellow Fever Following upon the heels of the discovery of the relation of mosquitoes to malaria, and second only to it in importance, came the discovery of a similar relation to yellow fever, in 1900. As in the case of malaria, some physi- cians suspected the instrumentality of mosquitoes in the dissemination of this disease before there was any proof of it. The proof came as the result of the illustrious work of the American Army Yellow Fever Com- mission, composed of Doctors Reed, Carroll, Lazear, and Agramonte, at the cost, indirectly, of the lives of three of them. What is known of the nature of yellow fever, and of the role of the mosquito in trans- mitting it, is discussed in Chap. X, pp. 182-185. It should be repeated here, however, that the "germ" of the disease is still unknown, though be- lieved to be a protozoan. The blood of a patient can infect a mosquito Fig- 201. Yellow fever mos- Tj. ii, 7 r quito, Aedes calopus, female. only durmg the first three days of (^fter Doane.) illness, and the mosquito cannot transmit the disease in less than 12 days later. In one case, hereditary transmission of yellow fever from an infected mosquito to its offspring has been shown to occur. The Transmitting Species, Aedes calopus. Unlike the condi- tion as regards malaria, yellow fever can be transmitted by only one species of mosquito, Aedes calopus (or Stegomyia fasciatus) (Fig. 201). This is a small black mosquito, conspicuously marked by white bands on the legs and abdomen, and
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