The Holly chieftain., 1899-02-10
WORK OF PARaslrrs.
,.aks-L,ke orsa.isss mat cir.v-
late rhrossh II Astsrsai
sxsten at HisAt

IN order to follow the s.ory Of d,.-
.ases in which parasites occur. let ma
take the bloodworm. Il htle lympha.ic
resels Of the human BODY here NAV be
present q hair-liks worn about three
inches In length. II pess out young,
and these contrive TO III secess to the
blood. They are mierosssp,e, actively
moviu. anake-like ofslsisms. Thev
circulste with the blood during The
uieht, but during the dsy they disap-
pesr from the general eii,alation. and
lie up In the lungs. Now.the mosquito.
IN animal Of nocturnal hahits, attacks
man a. the time when The yeune para.
dies are circulating in IL blood"
.It might all be the plot Of story-
- tragedy"
sAt night the mosquito hltss. and With
the blood swallows one or mare of those
parasites. The organism, bsins once in
the mosquitoes body. undsfeoes . re-
markable developmept Increasing In
,ize and acquiring organs q digestion.
| The mosquito in the Ordinary cour,e of
nature lays her eggs aboutthe seventh
day after feeding. She always does this
| ON the surface of water, md then she
lies and falls into the water The para
site thereupon escapes frun the mos
,uito into the water. and should that
water be drunk by q peson the para
site is acquired. / have been speaking
Of the germ of elephantiada, but
similar thread Of history applies to
most parasites and to mtny ether dis
cases.
"Does the man who takes the para
site with the water necessarily develop
| disease? 2"
.Oh, NO; that all depend. on cir
.umstauces. II will depend on the
general condition Of his health, on the
part of the body in which the organism
iocates-on . score of things You zee
that the mosquito prepares the parasite
10 do It's deadly work. and then places
II where It can do It. The mosquito
takes the thing. makes II robust, and
then spreads It where 1t can And q
ready passage into the human body.
The whole scheme Is like 4 wheel, re-
solving and revolving, once 1t has ol>-
lained motion"
"That ID the process Of action of q
parasite making . prey Of man."
"It is a sample. In the case of ma.
Iaria the process Is probably much more
Involved. / mean that the journey be.
tween the parasite and its very first
form. and the development Of human
disease AZ a result, may be much longer
Ny friend Surgeon Major Ross has re-
Gently carried out some interesting and
valuable experiments in India He got
mosquitoes that had fed on sparrows in
fected with the organisms Of which
have spoken. He kept the iniects iol
Ave or six days. until he knew the or
ganisms had developed. He then le
them loose again on sparrows In tn,
blood Of which. n established by exam
ination, there wsre no organisms. o.
this lot Of sparrows being tested late
II was found that they now had re
ceived the organisms from the mosgui
toes"
"You think distinctly that malari
may be acquired By the bite u MOI
quitoT'
Eyes; bat whether that IL the onl
way cannot venture to assert. PEI
haps not, for malaria multiplies indef
nitely outside the human body. qui,
Independently OF man. That we know
apd, In fact, malaria IL most prevalcn
In places where man 10 not Such stat
Of multiplication must demand som.
thing more than short cycle Of fror
man to mosquito and from mosquito I
man. Possibly an infection Of mosquit
BY mosquito is necessary, a. In tick dii
case or in silkworm disease. What w
want n q complete story Of the variou
species Of mosquito In malarial an
other lands. and Of their behavior 1
regard to the different varieties Of ma
iarial parasites. London Chronicle.
aSYYHADY1@ a ~@vvua nnyvra ..~~ A v~yr,