. American practice of surgery ; a complete system of the science and art of surgery . days. The parasite may in turn be transferred into the circulationof the person whom the mosquito bites. It is also believed by some observersthat the infection may be obtained from water in which the mosquitoes haveperished. The filaria is not often foiod in the United States, excepting in individualswho have brought it from the tropics. The possibility of its existence, however,is to be borne in mind by the physician, particularly in the South. It existsvery generally in the tropics. Egypt, Brazil, and the
. American practice of surgery ; a complete system of the science and art of surgery . days. The parasite may in turn be transferred into the circulationof the person whom the mosquito bites. It is also believed by some observersthat the infection may be obtained from water in which the mosquitoes haveperished. The filaria is not often foiod in the United States, excepting in individualswho have brought it from the tropics. The possibility of its existence, however,is to be borne in mind by the physician, particularly in the South. It existsvery generally in the tropics. Egypt, Brazil, and the South Sea islands aremost often mentioned as the infected districts. In some of the Pacific islandsnearly half the population show evidences of infection, and AshfordJ reports. Fig. 184.—Lymph Varix of the-Tliigh, from a Specimen in theMusee Nicaise. (Fischer.) *\Vood: Chemical and Microscopical Diagnosis, Applet on, Xew York, Manson, in Joumal of Tropical Medicine, May, 1900, p. AsMord, in X. Y. Med. Record, 1903, p. 724. 576 AMERICAN PRACTICE OF SURGERY. that twelve per cent of a battalion of native soldiers in Porto Rico had filarisecirculating in the blood, and he estimates that about the same proportion ofthe general population has the same condition. Symptoms.—It is possible for large numbers of the filarise to circulate in theblood and lymph without creating noticeable symptoms. The fact that a largenumber of people in the tropics harbor these parasites and still enjoy reason-ably good health shows how mild an effect they may have. Nevertheless, theyare prone to obstruct important lymphatics, and the result may then be veryserious. It is a mechanical problem. The adult filarige are large enough toplug large lymph vessels and thus obst
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