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MEASURES TO BE TAKEN FOR THE PREVENTION OF MALARIA,
372
Malaria (ague, intermittent fever) is due to the presence in the blood (in the corpuscles of the blood) of a minute organism. An attack of the fever is coincident with, and due to an netive phase of, this organism: it then multiplies in a remarkable manner. Between the attacks the organism is quiescent and dormant it may remain so for a long time.
Recent researches have shown that, at least in the vast majority of cases, probably in all cases, the organism is introduced into the blood, and thus the disease contracted, by the bite of a mosquito, generally, if not always, one species or other of the genus known as anopheles. The anopheles bites a malarions person, ir, a person whose blood contains the organism, and sucks up with the blood the organism. This organism develops and increases in the body of the anopheles, and there produces germs which pass into the salivary glands and proboscis of the insect. Hence when the mosquito bites another person, it introduces the organism into the blood of that person and so starts the disease.
Every individual anopheles is not necessarily infected with the organism, but in a district where malaria occurs the probability is very great of any anopheles being so infected.
Hence malaria, in the vast majority of cases, probably all cases, may be prevented, by preventing oneself from being bitten by infected aumpheles.
Prevention may
be secured-
1. By avoiding all bites of mosquitos.
'.
A. By living in rooms to which the entrance of mosquitos is completely shut off by thin meshed gauzes to. windows, doors, &c.
1. By sleeping under adequate mosquito curtains—the anopheles generally bites in the night or evening.
2. By avoiding sleeping or living near native huts in regions favourable for malaria. Although the natives become neclimatised
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TEC.O.885
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