CHAPTER XVI 



THE RESULTS ACCOMPLISHED BY THE ANTI-MALARIA 

 CAMPAIGN 



'T^HE methods of malaria control applied and 

 -* developed on the Isthmus were put to a 

 severe test and gave successful results. The 

 topography, meteorological conditions, and con- 

 stant changes due to the construction work, to- 

 gether with the character and constant moving of 

 the poptilation and their dwellings, and social 

 conditions, were peculiarly unfavorable to the 

 control work undertaken. The natives and em- 

 ployees, infected or well, were at liberty to live 

 where and how they chose. We had no control 

 over their movements or methods of living. 



The area covered by anti-malarial operations 

 was about fifty square miles, with a shifting 

 population of many nationalities. It is now evi- 

 dent that even under such adverse conditions, 

 malaria in the tropics may be kept down to a 

 minimum rate without prohibitive cost. 



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