The Republican. [volume] (Oakland, Md.) 1877-current, 1913-10-23
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presence stimulates human beings to eat clay and
earth. But there is another route, and one OF the
romances of science must now be explained. To
wards the end of the last century, when cholera
prevalent in Alexandria, Doctor Looss, the
distinguished parastoogist, was working in the
local laboratory at the larva of anCylostoma. In
transferring some of the water containing larvae
from one watchglas to another by means of
ppette he accidentally split drop on to the back
OF his hand. He did not wait to wipe it off, but
after a time he noticed that the place where the
drop had fallen intensely irritable and had be
Redeemed and infamed He then made
further experiment: placing drop of the fluid
swarming with larvae on the back Of his hand he
allowed 1t partially to dry up. The burning and
the reddening OF the skin began again and
little later when he removed what left Of the
fluid very few of the larvae to be found. The
great majority Of them had disappeared These
little trihes gave Doctor Looss "furously to
think" as the French say and he then repaired
to the hospital where he found boy whose leg
about to be removed He dropped a little of
the fluid full of ancylostoma larvae the leg, and
after the leg cut off the in question
removed and cut into sections. When these
lions examined through the microscope the
little ancylostoma larvae forcing their
way down into the body through the skin, espe
ciay travelling by the hair follcles and to
lesser extent. through the sweat glands into the
deeper layers of the skin. 1t was, of course, i'm
possible TO pursue this work with the human
ancylostoma and Doctor Looss had to carry on
his work with another species. The larvae of A
cadmium traced into the blood vessels and
lymphatcs of the dog Swept along In the blood
stream they easily reach the lungs Once arrived
in the lungs the larvae have difficulty in traV-
Crsing the soft pulmonary tissue and making their
way in the cavity of the respiratory organs.
Thence they travel along the bronchial tubes, and
so to the windpipe and into the larynx and up al
most into the mouth, and here they turn back into
the oesOphagus ard so down into the stomach and
intestine The whole of this remarkable journey
takes from seven to ten day. They then shed the
skin of their second moult and later, when they
and fourth ecdysis or moult. In eight days they
become capable Of reproduction, and in a very few
rore days tie eggs then passing away from
the body Of the host. The whole cycle of their
lifehistory has taken, under favorable circum-
stances from month to six weeks; under unfa-
vorable circumstances ii be almost indefinite
ly prolonged The truth of this very remarkable
and until Doctor Looss' Investigations quite I'M
heard of lfe-histOry is nov, accepted. Doctor Sam
bon. however thinks that in many cases the an
cylostoma larvae reach the alimentary canal with
the blood stream, and directly penetrate it's walls
without passing through the lungs.
Since the middle of the seventeenth century
fatal disease has been known to exist in the
warmer parts of America In l648 Pso in his
Historic Medco Brazilae," gives an account
of disease which he calls "Oppiacao" and