XXV 
MOSQUITOES 
30 
Mr. George Warren, who in consequence developed 
malarial fever, and the Plasmodium malarice was found 
in abundance in their blood. 
It is now an accepted fact that the malaria parasite, 
under natural conditions, can be acquired by man 
through the bite of a mosquito. It is also recognised 
that the mosquito acquires the parasite by ingesting 
the blood of a man or a mammal infected with 
malaria. 
It is clear in these circumstances that in order to 
eradieate malarial diseases it is only necessary to 
destroy the species of mosquitoes which act as trans¬ 
mitters. This of course is a difficult task, but wherever 
efficient steps are taken to prevent the breeding of 
mosquitoes by filling up pools, draining marshes, and 
emptying the stagnant water from cisterns, tanks, 
gutters, and the like, near villages and dwelling-houses, 
in districts where malaria is endemic, the number of 
infected patients steadily diminishes. 
The surest, safest, and simplest of all measures is to 
avoid being bitten by infected mosquitoes : as these are 
nocturnal insects and easily excluded by the use of thin 
wire-gauze or the well-known mosquito curtains for 
windows, doors, and openings of living and especially 
sleeping apartments, the task is neither severe nor 
irksome. 
References. 
Cook, A. R. .“ Notes on the Diseases met with in 
Uganda,” Journal of Tropical Medicine^ 
1901, p 175. 
Manson, Sir Patrick ... Tropical Diseases, Fourth Edition, 1909. 
Sambon, L. W.“Ticks and Tick Fevers,” Journal of 
Tropical Medicine, 1900, p. 217. 
