Holding that the attitude of the sanitarian, in regard to the
germ theory of diseases, as applied to all diseases of the zymotic
class, must be one of reserve, yet, he said, even if the views of those
who are prepared to accept the germ theory of disease to its fullest
extent were shown to be true, it seems to be certain that if the
invasion of these occult enemies present in the air is undertaken in
insufficient force, or upon an animal in sufficiently robust health,
they are refused a foothold and expelled; or, if they have secured a
lodgment in the tissues, they, so to speak, may be laid hold of, and
absorbed or digested by them.
In corroboration of this view, Professor Koch and others state that the
minor organisms of tubercular disease do not occur in the tissues of
healthy bodies, and that when introduced into the living body their
propagation and increase is greatly favored by a low state of the
general health. The President held that for the present sanitary
procedure was independent of these theories on the germ origin in
particular of zymotic disease; but gave the facts as worthy of
consideration, as indicating points for the direction of those who aimed
at preventing disease.
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