African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5233

Full Length Research Paper

Comparative survival of acid-adapted Salmonella Heidelberg, Salmonella Montevideo and Salmonella Tennessee in simulated gastric fluid

Réka Ágoston1, Hyun-Jung Chung2, Woo-Suk Bang3 and Hyun-Gyun Yuk1*
1Food Science and Technology Programme, National University of Singapore, 3 Science Drive 3, 117543 Singapore. 2Department of Food and Nutrition, Inha University, Incheon 402-751, Korea. 3Department of Food and Nutrition, Yeungnam University, 214-1 Dae-dong, Gyeongsan-si, Gyeongsangbuk-do, 712-749, Korea.
Email: [email protected]

  •  Accepted: 23 July 2012
  •  Published: 18 December 2012

Abstract

This study compared the ability of Salmonella Heidelberg, Salmonella Montevideo andSalmonella Tennessee to adapt to acidic conditions (pH 6.0 and 5.0) and subsequently to survive in simulated gastric fluid (pH 1.5). Cells adapted at pH 5.0 showed lower maximum growth rates than non-adapted and adapted cells at pH 6.0. The resistance of acid adapted S. Heidelberg and S. Montevideo against simulated gastric fluid (SGF) decreased as the pH for adaptation was reduced. This study might be helpful to understand behavior of these particular Salmonella strains during transit through the stomach after they are adapted to acidic foods.

 

Key words: Salmonella, acid adaptation, acid resistance, growth modeling, simulated gastric fluid.

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