xxv MOSQUITOES 317 



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 

 eradicate 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. 



Sumbon, L. \V "Ticks and Tick Fevers," Journal of 



Tropical Medicine, 1900, p. 217. 



