The Portland daily press., 1899-08-25
Always Bought. In Use for Over 80 Years

malaEiai germs. These are supplied from
| the laboratory stock, for the mosquitoes
are not generally furnished with the
germs when caught. BY feeding tbs
germs are introduced into each mosquitoes
stomach. Then commences the delicate
part OF the experiment.
Every two hours or thereabouts, O
mosquito must be killed and its body
prepared for microscopic examination.
This search under the magnifying lenses
discloses that the malarial germs are
broken up In the mosquitoes stomach.
Each part becomes impregnated In q little
sack or tumor In the stomach wall.
Within this sack minute bodies, lenticu-
lar or diamond-shape. are formed, and
finally the sack bursts without the stom-
ach, thus allowing the little bodies which
have the power of movement, to get into
the circulation Of the noqsuito. Once In
this condition. they quickly flEd their
way to the salivary glands Of the mos
quito. where they congregate. BY this
time the mosq uito is ready for "busi-
ness, and those of the insects which
have not already given up their lives to
the inquisitive eye of science may be used
TO inoculate the malariai germ into birds
or animals.
During this intermediates process In the
body of the mosquito. the doctors have
learned that the malaria germ is one OF
three varieties, producing one of three
distinct types Of the disease. One form
or germ, which splits up into from eigh-
teen to thirty of the diamond shaped
bodies natures every forty-eight hours
and causes the every-other-day chill, or
tertian variety, when introduced into the
human circulation. Another form, split
ting into fewer bodies, produces the chill
one day and respite for two, or the
quartan variety Of malaria. A third form
develops irregularly and produces a cor
responding irreguiarity In the time Of
chilis recurring.
Strangely enough, each variety OF germ
is bred by distinct variety of mosquito.
%he tertian, or every -other-day chill.
germ Is found only in the MOSQUITO
known as the anopheles claviger, or
"Key btarer.
With his MOSQUITOES thus "loaded, " as
it were, with germs. the doctor Is ready
to begin his incubation of the crows.
When the mosquito uses it's pxobosois to
suck the blood of it's victim, 1t injects
from It's salivary glands portion of the
nuid which Is tmpregnated with rnalariaI
germs. or course, the germs get directly
into the blood vessels, travelling from
small oapillaries to veins aud farteries.
The nrst object Of attack of the little
diamond-shaped bodies, bred Ia the
mosquito, is the red blood corpuscles.
Some OF the tiny bodies force their way
into the corpusoles although. of course.
many of the corpuscles successfully resist
the attack. Many CT the little bodies
perish In the struggle for existence
Those of the little bodies which secure
q resting-place within the corpuscles
quickly 20 about their subdivision
method of propagation, and at the given
time the Increased number of diamond
SNAPPED bodies are ready to burst forth
from the corpuscle. This occurring at
stated intervals, according to the time OF
maturing OF the particular variety of
germ, causes chill, as the thousands Of
Injected corpuscles burst at nearly the
same minute. In this way a microscopic
OF the blood Of an infected
person determines exactly the variety Of
germ and the prediction can be accurately
made as to the time of the next chill after
q study Of the stage of development Of
the germ.
Some OF the germs put forth fiageila, or
tails. which waggle about In the blood
current Of the Victim and finally break
OIL from the parent body. Then these
tails propel theniselve about In the blood
stream until Q rull-grown parasite Is
met when an endeavor is made to ham,
Iner way through its walls. When the
hagella succeeds It IL believed 1t Is car
Fying out the act Of fertilization.