IS200 and multilocus sequence typing for the identification of Salmonella enterica serovar Typhi strains from Indonesia

Authors

  • Areli Martínez-Gamboa National Institute of Medical Sciences and Nutrition Salvador Zubirán, Mexico City.
  • Claudia Silva Institute of Biotechnology, Department of Molecular Microbiology, UNAM, Cuernavaca, Morelos.
  • Marcos Fernández-Mora Institute of Biotechnology, Department of Molecular Microbiology, UNAM, Cuernavaca, Morelos.
  • Magdalena Wiesner Institute of Biotechnology, Department of Molecular Microbiology, UNAM, Cuernavaca, Morelos.
  • Alfredo Ponce de León National Institute of Medical Sciences and Nutrition Salvador Zubirán, Mexico City.
  • Edmundo Calva Institute of Biotechnology, Department of Molecular Microbiology, UNAM, Cuernavaca, Morelos.

Keywords:

Salmonella Typhi, bacterial molecular typing, multilocus sequence typing (MLST), clonal complex, insertion sequence IS200

Abstract

In this work, IS200 and multi-locus sequence typing (MLST) were used to analyze 19 strains previously serotyped as Salmonella enterica serovar Typhi and isolated in Indonesia (16 strains), Mexico (2 strains), and Switzerland (1 strain). Most of the strains showed the most common Typhi sequence types, ST1 and ST2, and a new Typhi genotype (ST1856) was described. However, one isolate from Mexico and another from Indonesia were of the ST365 and ST426 sequence types, indicating that they belonged to serovars Weltevreden and Aberdeen, respectively. These results were supported by the amplification of IS200 fragments, which rapidly distinguish Typhi from other serovars. Our results demonstrate the utility of IS200 and MLST in the classification of Salmonella strains into serovars. These methods provide information on the clonal relatedness of strains isolated worldwide. [Int Microbiol 2015; 18(2):99-104]

Keywords: Salmonella Typhi · bacterial molecular typing · multilocus sequence typing (MLST) · clonal complex · insertion sequence IS200

Author Biography

Claudia Silva, Institute of Biotechnology, Department of Molecular Microbiology, UNAM, Cuernavaca, Morelos.

Institute of Biotechnology,
Department of Molecular Microbiology, UNAM, Cuernavaca, Morelos, Mexico

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