The daily morning journal and courier. [volume] (New Haven, Conn.) 1894-1907, 1899-09-18

''''N
laria. A third form develops Irregular
| ly and produces corresponding lrregu-
| larity in the time of chills recurring.
Strangely enough, each variety OF
germ is bred by distinct variety or
mosquito. The tertian, or eVery-other-
day chill, germ is found only In the
mosquito known as the anopheles claw
iger or "key-bearer.
With the mosquito thus loaded,
as it were with germs, the doctor is
ready to begin his incubation OF the
crows. When the mosquito uses lts
proboscis to suck the blood of its VIC
TIM it injects from it's salivary glands
portion of the fluid which is impreg-
mated with malarial germs. or course
the germs get directly into the blood
vessels, travelling from small capillanes
to veins and arteries The first object
of the little diamond-shaped bodies,
bred in the mosquito, is the red bloo&
corpusces. Some of the tiny bodies
force their way into the corpuscles, all
though, of course many Of the corpu-
scles successfully resist the attack.
Many Of the little bodies perish in the
struggle for existence"
Those of the little bodies which Sc
cure resting place within the eorpu-
scles quickly so about their subdivision
method of propagation, and at the given
time the increased number of diamond
shaped bodies are ready to burst forth
from the corpuscle. This, occurring at
stated intervals. according to the time
germ, causes chill. as the thousands of
of maturing this particular variety OF
infected corpuscles burst at nearly the
same minute. In this way micro
scropic examination of the blood of an
infected person determines exactly the
variety and the prediction can be accu-
rately made as to the time Of the next
chill after a study of the stage of de-
velopment of the germ.
Some of the germs put forth fagella,
or tails, which waggle about in the
blood current of the victim and finally
break off from the parent body, Then
these tails propel themselves about In
the blood stream until a full-grown
parasite is met, when an endeavor Is
made to hammer a way through its
walls When the fagella succeeds it Is
believed it is carrying out the act of
fertilization.
Thus inoculated the crow is consider
cd a fit subject for another crop OF
which may suck the maIar-
ial germs from their victims blood and,
after the intermediate process, be ready
to inoculate other birds, as the investl-
cation is carried on one point mas
been settled conclusively, so the doctors
say, and that is that the mosquito can
not directly inoculate malaria from an
infected person or bird to another AL
though the mosquito may have malarial
germs in it's stomach, 1t cannot transmit
them until the process of reproduction
has been gone through with and the
germs get into the salivary glands,
Usually the birds are not injured by
the incubation and survive the pur-
poses of the doctors for further expert
The remaining mosquitoes
are killed off without compunction or
protest from NEUTRALITY-SUSPICIOUS.. Some
experimenters have had their birds sue
cumb to the severity of the disease thus
introduced into their systems,
Investigation of the transmission in
malaria by mosquitoes was suggested by
the following facts as set forth by DR.. |
w lltldUl y. IldNtI Ul tpdllllIlOlt III Il
paper on malaria read before the Mary |
land Public Health Association;
Mosquitoes invariably exist in mala-
rious regions, and the malaral fevers
are more prevalent at those periods |
when the mosquitoes are most abund- |
INT; they are especially numerous in the |
'egions about swamps and marshes, |
where the dangers of infection are |
greatest In a malarious district there |
S greater danger Of infection at about
shutdown and at night, but sunset and |
light are periods at which mosquitoes
ire highly active. The dangers of in
ection are greater near the ground than
II elevated positions, but mosquitoes |
ire more numerous near the ground.
rhe danger of infection is greater on
luet nights than in windy weather but
Wind is particularly unfavorable to the
mosquito.
Emin Pasha was so convinced that
he bite of the mosquito played an inn
,ortant part in the etlology of malarial
ever in Africa, that he always travelled
With a mosquito net, and escaped the
disease. Bignami, further, has noted
hat in certain parts of Italy workmen
Who live in coniCa butts, with q hole
It the top, through which the smoke
# their little fire passes are unusually
rec from the disease, while those about
hem may be almost universally infect
ID. OF course, the presence of smoke is
me of the surest projections against
"Koch, who last year devoted some
months in Africa to the study of ma
aria was strongly impressed with the
of this hypothesis. lie
avs:
The more / study this disease the more
incline toward the opinion that the
after Gransference of the infection by
means of the mosQuito) is the main.
robaby the only method. Wherever
ne goes, he finds tropical malaria and
he mosquito present together On the
cast Gn East Africa there are several
laces which are free from the disease.
ne of these Is the island Of Chol7, which
es upon the southern extremity of the
he island Malta This is the only
lace on the coast where I could sleep
'ithout a mosquito net. In the noun
aims malaria stops at exactly that |
oint where no mosquitoes are to be
)und Inland malaria diminishes to-
ether with the mosquitoes. At those
L. |