This experiment was repeated several
times. Then in another building similar, except that it was ventilated
by mosquito-proof windows, and had been thoroughly disinfected, another
volunteer was bitten by mosquitoes which had first bitten patients
suffering with yellow fever; and he developed the disease. The last
paragraph of the extract is as follows:]
"Thus at Camp Lazear, of seven nonimmunes whom we attempted to
infect by means of the bites of contaminated mosquitoes, we have
succeeded in conveying the disease to six, or 85.71 per cent. On the
other hand, of seven nonimmunes whom we tried to infect by means of
fomites [cloth and other material generally capable of carrying
germs] under particularly favorable circumstances, we did not
succeed in a single instance."
It is evident that in view of our present knowledge relating to the mode
of transmission of yellow fever, the preventive measures which have
heretofore been considered most important, that is, isolation of the
sick, disinfection of clothing and bedding, and municipal sanitation,
are either of no avail or of comparatively little value. It is true that
yellow fever epidemics have resulted, as a rule, from the introduction
to a previously healthy locality of one or more persons suffering from
the disease.
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