The principal effort to control this dangerous insect must be made at
the source of supply--its breeding places. Absolute cleanliness and the
removal or destruction of anything in which flies may breed are
essential; and this is something that can be done even in cities.
Perhaps it can be done more easily in the cities than in villages, on
account of their greater police power and the lesser insistence on the
rights of the individual. Once people are educated to the danger and
learn to find the breeding places, the rest will be easy.
In spite of what has just been said, it is often necessary to catch or
otherwise destroy adult flies, or to protect food materials from
contamination and persons from annoyance or danger; hence the value of
fly papers and poisons, flytraps, and insect screens.