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2018 | 67 | 1 |

Tytuł artykułu

Molecular characterization of the cry gene profile of Bacillus thuringiensis isolated from a caribbean region of Colombia

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In order to characterize native strains of Bacillus thuringiensis of the Colombian Caribbean with toxic effect against insect vectors, 28 samples of bacteria identified as B. thuringiensis were isolated from different soils and muds around the city of Valledupar. Using a biological test, five isolates of B. thuringiensis showed toxic effect against larvae of Aedes aegypti. PCR methods were used to detect cry1, cry2, cry4B, cry10 and cyt1 genes. Cry1 and cry2 genes were detected in 35.7% and 32.1% of the 28 isolates analyzed, respectively. Surprisingly, reduced lengths of cry4B gene segments were detected in 28.6% of B. thuringiensis samples. The presence of cry10 or cyt1 was not detected in any of the 28 samples of B. thuringiensis, despite the high sensitivity of the assays used. The results show that B. thuringiensis samples from the Colombian Caribbean have atypical characteristics compared to those of Latin America and elsewhere in the world, which is consistent with the idea that the geographic origin of B. thuringiensis samples is associated with their biological and genetic characteristics.

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  • Research Group of Parasitology and Agroecology Mileno, Popular University of Cesar, Cesar, Colombia
  • Cellular and Molecular Biology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
  • UNIMOL Laboratory, Tropical Medicine, University of Cartagena, SUE-Caribe, Colombia
  • UNIMOL Group, Department of Pharmacie, Faculty of Science, National University of Colombia, Bogota, Colombia
  • Cellular and Molecular Biology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
  • Human Genetic Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
  • Cellular and Molecular Biology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile


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