. Adventures with animals and plants. Biology. Fig. 309 The malaria-carrying ?nosquito (Anopheles) sucking blood. It ''stands on its head''' when biting. The common viosquito (Culex) holds its body parallel to the surface of the skin, (science service) with rat guards, big metal plates, that make it impossible for a rat to leave the ship by way of the rope. The list of insect carriers is a large one. To name but a few: the body louse car- ries typhus germs; some mosquitoes carry yellow fever germs; a species of fly native in Africa (tsetse fly) carries the germs of African sleeping sickness. B
. Adventures with animals and plants. Biology. Fig. 309 The malaria-carrying ?nosquito (Anopheles) sucking blood. It ''stands on its head''' when biting. The common viosquito (Culex) holds its body parallel to the surface of the skin, (science service) with rat guards, big metal plates, that make it impossible for a rat to leave the ship by way of the rope. The list of insect carriers is a large one. To name but a few: the body louse car- ries typhus germs; some mosquitoes carry yellow fever germs; a species of fly native in Africa (tsetse fly) carries the germs of African sleeping sickness. But the mosquito which transmits malaria does the greatest damage. The importance of malaria. Malaria is common in warm climates, especially in swampy regions where mosquitoes breed. In our southern states there are about 4,000,000 cases every year. Although few of them result in death, the loss in working time due to the disease is very great. Malaria probably costs the coun- try as much as 500 million dollars a year. Worse than that, it brings misery to mil- lions of persons. In the tropics malaria is often fatal; it probably causes the death of a million people yearly in India and Pakistan alone. The medical department of our army rated it as the most impor- tant of all diseases during World War II. In the early part of the war in the South Pacific about one out of every ten men became ill with malaria. But a well or- Stop the Spread of Disease 349 ganized attack on the disease soon cut down the number of cases to one per five hundred men. Malaria leaves no immunity and each patient becomes a carrier for several years. An age-long mystery is solved. Malaria means "bad air," and damp night air was once considered especially "; The reason for this is obvious, now that we know that malaria is spread by the mos- quito. Mosquitoes breed in stagnant or slowly flowing water. They are numer- ous where the ground is swampy and the air is damp. Thirty known spec
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Keywords: ., bookcentury1900, bookpublisherbostondcheath, booksubjectbiology
