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Title: Characterization of Mosquito Larvicidal <i>Bacillus thuringiensis </i>Isolated from Soils of India
Authors: Sur, Banani
Nigam, Nitu
Joshi, A K
Bihari, Vinod
Keywords: <i>Bacillus thuringiensis</i>
Ecological niche
Parasporal inclusion
Issue Date: Apr-2003
Publisher: NISCAIR-CSIR, India
Abstract: It has been established now that insects are acquiring resistance to commercial products of <i>Bacillus thuringiensis. </i>So there is a continuous search for bacteria producing new toxins. With this in view, an insecticidal <i>B. thuringiensis </i>was isolated from soil sample obtained from the vicinity of a penicillin factory in Vadodara, India. The isolate belongs to serotype H-14. Phenotypic characters of the isolate were identical to standard <i>B. thuringiensis </i>var. <i>israelensis </i>IPS-82. It was found to possess good larvicidal activity against <i>Anopheles stephensi </i>and <i>Culex pipiens </i>and exhibited high resistance for penicillin (500 ug/ml), The electrophoretic protein profiles of purified crystals with standard <i>B. thuringiensis </i>(IPS-82) were studied. The isolate apparently showed the same protein profile as that of <i>B. thuringiensis </i>var. <i>israelensis. </i>Soil with natural selective pressure of antibiotic penicillin thus appears to be a good ecological niche for the isolation of <i>B. thuringiensis.</i>
Description: 268-270
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Appears in Collections:IJBT Vol.02(2) [April 2003]

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