. The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools . to the blood. Hydrophobia usuallyresults from the bite of a rabid dog with the germs in hissaliva. Trichinosis comes fromeating pork not well cooked andcontaining little worms. Theparasites causing malaria oryellow fever can reach the bodytissues only by the bite of cer-tain species of mosquitoes. Themalaria mosquito may always berecognized by the fact that ithas spotted Avings and holds itsbody oblique to the surface onwhich it alights, so that itappears to stand
. The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools . to the blood. Hydrophobia usuallyresults from the bite of a rabid dog with the germs in hissaliva. Trichinosis comes fromeating pork not well cooked andcontaining little worms. Theparasites causing malaria oryellow fever can reach the bodytissues only by the bite of cer-tain species of mosquitoes. Themalaria mosquito may always berecognized by the fact that ithas spotted Avings and holds itsbody oblique to the surface onwhich it alights, so that itappears to stand on its head. Cholera infantum and otherdiarrheal diseases often resultfrom the use of unclean milkand water or from food vesselsin which certain bacteria havedeveloped. Alcohol and Disease. — Thecontinual use of liquor weakensthe cells of the body whichnaturally kill off the harmful germs,clearly show that those consuming alcoholic drinks, exceptin very small quantities, are not only attacked sooner thanothers by infectious diseases, but are also less able to resistthe effects of the disease. The greatest Russian scientist. Fig. 180. — Position taken by acommon mosquito (Culex) a,and by a malaria mosquito(Anopheles) &, when that in the malaria mos-quito the two palpi just belowthe sucking bill are aboutfour times as long as in thecommon mosquito. AfterHoward. Late investigations 270 THE CAUSE OF DISEASE has lately said that alcohol paralyzes those elements in thebody tending to prevent disease. By experimenting hefound that in exposing rabbits to certain disease germsonly those animals which had been given alcohol ever contracted thedisease. Constant usersof alcoholic drinksare especially lia-ble to fall a preyto diseases of therespiratory sys-tem. Alcohol soweakens the bodycells which ordi-narily destroy thegerms of pneu-monia that thedisease is oftenable to gain ahold in the sys-tems of enlargement
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