EXAMPLES OF MOSQUITO EXTERMTNATIVE MEASURES. 



91 



In Klang and Port Swettenham we have 368 deaths due to fever in 1901, and 45 only 

 in 1905; whereas in the rest of the district, which has not been dealt with by any 

 special antimalarial works, we have 2G6 deaths due to fever in 1901 and 351 in J 905. 



It may here be mentioned that Klang is a large planting district about 380 square 

 miles in extent, that it is mainly low-lying flat land, utilized for the cultivation of 

 rubber, and that it would be almost impossible to protect the scattered population 

 from malaria by drainage and filling in swamps. A great deal is now being done on 

 most of the estates by regular administration of quinine, and also by protection from 

 mosquitoes. 



Malaria in children as evidenced by examination of blood. — No better indication of the 

 presence or absence of malaria in any given district can be obtained than by a systematic 

 examination of the blood of children. 



The following details of the results of examinations carried out by Dr. Watson in 

 1904 and 1905 are of considerable interest: 



Results of examination of blood of children in Klang and Port Swettenham (specially 



drained areas). 





November and December, 1904. 



November and December, 1905. 





Number 

 examined. 



Infected. 



Percentage 

 infected. 



Number 

 examined. 



Infected. 



Percentage 

 infected. 



Klang 



173 



87 



1 



0.57 

 1.14 



119 

 76 



1 

 1 



0.84 





.00 







Total 



260 



2 .76 



195 i 



.51 















Results of blood examinations in other parts of district not especially drained. 



November and December, 1904. 



November and December, 1905. 



Number 

 examined. 



Infected. 



Percentage 

 infected. 



Number 

 examined. 



Infected. 



Percentage 

 infected. 



298 



101 



33.89 



247 



59 



23.8 



Improvement in health of government employees. — The remarkable way in which the 

 health of the government employees residing at Klang and Port Swettenham has been 

 affected is well shown by the following figures. It may be mentioned that in 1901 

 the number of persons residing at Port Swettenham, employed by the Government, 

 was 176, and in 1904, 281. 



Table showing number of sick certificates and number of days' leave grunted on account of 



malaria. 





1901. 



1902. 



1903. 



1904. 



1905. 





236 

 1,026 



40 

 198 



28 



73 



14 



71 



4 





30 







The conclusions to be arrived at from the figures given in this report are very 



evident: 



(1) Measures taken systematically to destroy the breeding places of mosquitoes in 

 the towns, the inhabitants of which suffered terribly from malaria, were followed 

 almost immediately by a general improvement in health and decrease in death rate. 



