Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Characteristics of Thirty-Six Bacillus thuringiensis Isolates and a New Serovar of B. thuringiensis subsp. kim (Serotype H52)

  • Published : 1999.10.01
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Abstract

Thirty-seven strains of Bacillus thuringiensis were isolated from Korean soil and examined for H-antigen serotyping, toxicity, and different spectra of biological activities. The isolate HL-175 bore a specific H-antigen, different from the 51 known serotypes, a spherical $\delta$-endotoxin crystal, and minor different biochemical characteristics. It was resistant to ampicillin, colistin, and penicillin G. Therefore, it was classified as a new serotype, H52, with the name kim. The other 36 isolates also produced endotoxin crystals and endospores. The crystal shape of eight strains was cuboidal while the others were bipyramidal. Biochemical characteristics of the isolates were only slightly different from the known serotypes of B. thuringiensis. The flagellar (H) antigens of the 36 isolates were identified as: one colmeri (H21), three galleriae (H5a,5b); two pakistani (H13); one toumanoffi (H11a, 11b); and twenty-nine kurstaki (H3a,3b). All 36 isolates were resistant to ampicillin, colistin, penicillin, cephalothin, and chloramphenicol.

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