Abstract
The influence of clay minerals, humic acid and capsular polysaccharide on the survival of Klebsiella aerogenes exposed to drying and heating in soils was investigated. The study of three types of soils showed that the survival of the bacteria was higher in montmorillonitic than in kaolinitic soils. When a sandy soil was amended with 10 per cent montmorillonite, 10 per cent kaolinite or 0.5 per cent humic acid, the survival of K. aerogenes was increased in the presence of montmorillonite but was not affected by kaolinite or humic acid. It was suggested that montmorillinite affected the pattern of water retention by the cells during the drying process. The influence of capsular polysaccharides was also investigated and no significant difference was abserved between the survival of the encapsulated and non-capsulated strains of K. aerogenes exposed to drying and heating in soils. re]19750321
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