File:Health in home and town (1912) (14761846756).jpg

Identifier: healthinhometow00brow (find matches)
Title: Health in home and town
Year: 1912 (1910s)
Authors: Brown, Bertha Millard, b. 1870
Subjects: Sanitation, Household Public health
Publisher: Boston, D.C. Heath
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Mosquito Eggs and Larvae carries malaria is large in size and is found in the long grass on the margins of marshes, lakes, ponds, and rivers. The tiny eggs float on the surface of the water and soon develop into small larvae about one quarterof an inch long. These lie close beneath the surface,for they must obtain the air above for breathing. Aftera few days they change into another form called the pupa, identified by a very large head. After five orten days changes take place within the pupa, and the THE PREVENTION OF DISEASE 263 adult mosquito escapes from the empty skin. All of the early life of the marsh mosquito, then, is spent near the surface of water. Destroying the Mosquitoes. — The mosquito maybe killed by destroying either the early forms or the adult. The fight against mosquitoes must begin by locating the places where they breed. A search in
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Pupa and Adult Mosquito

stagnant water in malarial districts will usually show the larvae. Disturbing the grass near by will probably start up a swarm of mosquitoes. Whenever possible, low, wet places should be drained, and the long grass cut. Low places may sometimes be filled in with soil. Destroying the breeding places is the first and the most important measure in fighting mosquitoes. Oiling Ponds. — When it is not possible or desirable to drain a pond, the young mosquitoes may be killed while in the water. For this purpose kerosene oil is spread on the surface. The oil forms a layer on the top of the water and suffocates the larvae just below.It also destroys many mosquitoes which may be flying near the water, as well as the floating eggs. Oiling should be done every two weeks as the kerosene gradually evaporates. Fish and Mosquitoes. — Another way of clearing a pond or lake of young mosquitoes is to stock it with small fish. Goldfish and minnows have proved u

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