SURVIVAL OF PATHOGENS IN SOIL AND WATER 35 



far less efficient in removing the bacteria than heavy loam or clay soils j 

 (b) biological effect, resulting in the destruction of the bacteria in the 

 soil. As a result of early studies on the survival of the cholera organism 

 in the soil, certain soils became recognized as "cholera immune" or as 

 "cholera destroying" (736). 



