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ENHANCEMENT OF VIRULENCE OF BACILLUS THURINGIENSIS AND SERRATIA MARCESCENS BY CHEMICALS
Khalid Idrees Khan
University College of Pharmacy, University of the Punjab, Lahore, Pakistan.
Abstract: Studies were conducted on the enhancement of pathogenicity of Bacillus thuringiensis by 1% boric acid against various species of termites. The increase in virulence of Serratia marcescens by 1% Potassium chloride or 1% Sodium citrate against the workers of M. championi has also been established. The increase in virulence is confirmed by the enhancement ratios, which are ranging from about 1.5 to 1.8 for Bacillus thuringiensis and 1.3 to 1.6 for Serratia marcescens. It was also noted that 1% boric acid alone was found toxic to various species of termites. However, Potassium chloride and Sodium citrate in a concentration of 1% were non-toxic to the workers of M. championi.
Keywords: Bacillus thuringiensis, Chemicals, Serratia marcescens, virulence.