1919.] The Sixth Indian Science Congress. CCxix 
(1) The egg anger resulting from the carriers of this 
infection na cal communi 
(2) ae Pre ein ae jtomdotio of this. persistent infection on the 
vidu al hi mself. 
2. a prevalence of amebic infections among the troops in 
_ se I Mesopote sak. 13% to 18% of the men in an unselected series 
4 been 
man ; while in the case of a unit pense had never been in Meso opotamia 
but had been stationed 9 months n India, since its arrival from England, 
9% were found to be cyst treat ne of 216 
- In view of this wide prevalence of histolytica infection, evidence 
is brought torw ard — that the detectio on and treatment of histo- 
lytica carriers and t mpted ** clearing” of patients ne ee, from 
ameebic dysentery is ers 7 halides value in the prevention of the 
spread of amcebiasis while i it would be of very doubtful foasibilit ; 
though the necessity for the efficient treatment of cyst carriers 
i i ot appear to hav 
serv: 
is required for the sake of the individual him self, in order to preve 
occurrence of serious illness due to the pabbiopeaties itlooks of the siieholytine 
ion 
» Recent methods of treatment of cyst carriers are briefly discussed , 
and a short account is given of the Prmdtions obtained on treating a seriss 
of 80 18 
cases with a course of s of emetine ey chloride spread 
over 12 days, 1 grain being given hypodermically and 3 grain orally each 
day. The results were carefully con rolled by a series of hes oka orn oA 
logical Pog 
ter the mr BERT, 
while after- history reports for the following 6 Psi were aout $ 
garding Led oe eto of 73 of the men. 
6. nelusi 
sion is reached that in view of the nature 
poe the intestine of chronic relapsing dysenteries, it is 
very doubtful whether the eradication of the infection in s 
expec the administration of emetine in rm or by 
mode. Attention should be baron ale on the thorough sar _treat- 
ment, by the combined ee and oral oT tee a ine, of 
Timary acute attacks and of cyst antes when Sparse 
of ulceration of the pee are so light as to be statieeky mn eealieibls, 
The rat problem.—By J. G. C. Kunnarprt. 
The rat problem is one of considerable Psa importance to all 
countries, but particularly so to this one, for India is a at -pro- 
ducin try 
— - hre tegories : 
(t) Diseases ec: d by rats, of which plague is by far the most im- 
portant ; (72) Medited densrae caused by rats, of which get wa 
and damage to, grain and crops are the chief items; (éii) expense: 
curred in rat destruction eg in anti-plagu _— res generally, of oaeh 
evacuation is nomic the most important. 
i order fnlly to appeals the damage caused by rats, the total 
not less than Rs. 1,242} crores £828,000, 000. Of Vicged S sum £428 
pa pe may be debited directly or iodieeetie to plague. 
material dama: 
from anti- lague measures, no systematic attempt at the 
vacates of the rat popeluaiel has been made by the State or by bis 
