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which it is produced in nature, that is, the parasite is deposited into a healthy
bit of skin. I believe the variable incubation period, one week to six months
as seen in those people who came to Cambay for short periods and then went
away, is easily explained by the smaller or larger number of parasites inocula-
ted into the skin; it can be well understood that the degree of infection of a
blood-sucking insect, such as the bug, may vary, so that in one case many
parasites may be inoculated and in others very few.

      The cases I have recorded above are of considerable importance as the
majority of people who have become infected with Oriental Sore are unable to
recall definitely whether they have been bitten by any insect.

      Lastly when in Cambay, I examined the bodies of several hundred children,
carefully noting the site of the scars, and found that they were present on
every region of the body, except the genital organs, palms of the hands and
soles of the feet. One typical fresh sore, containing numerous parasites, was
seen on the scalp, just over the centre of the right parietal bone; this was in a
small Mahomedan boy whose head had not been shaved the year previously, as
the father who was an intelligent man informed me. Four years before another
of his children had had the sore, but this little boy had then escaped. I also
saw several scars on the scalps of other children. All observers who have
studied Oriental Sore, have repeatedly stated that, as it usually occurs on
exposed parts, it cannot be transmitted by the bed bug, because this insect is
said to bite only the covered parts of the body. The statement regarding this
habit of the bug is totally erroneous, as any one who is willing to take the
trouble, can demonstrate for himself. I have a vivid recollection of once sleep-
ing in a bed which contained many of these insects. I was wearing a pyjama
suit; the uncovered parts of my body were the lower thirds of my legs, and
forearms, my neck and head, and these were the exact places where I was
bitten. Indians are accustomed to sleep with only a loose loin cloth on, and to
cover themselves with sheets or blankets; thus the whole of their bodies, except
this part, are obviously exposed to the bites of bugs. The bug is the only insect
(with the exception of the head louse) which will bite the scalp, and one of the
commonest places to find bugs is in the head-gear of an Indian; these turbans
on being removed at night are usually placed on a peg on the wall, and bugs will
regularly crawl into them and hide in the folds. I have repeatedly removed
large numbers of these insects from these places. In. the same way the topees
of Europeans may become infected. This is the only way I can explain the
occurrence of Oriental Sore on the scalp. I have now endeavoured to explain
why I consider the bug to be the most probable transmitter, and I am well
aware of the oft repeated statement that if it were the bed bug, the disease

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