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Virulotyping of Salmonella enterica subsp. enterica isolated from indigenous vegetables and poultry meat in Malaysia using multiplex-PCR


Khoo, Chai Hoon and Cheah, Yoke Kqueen and Lee, Learn Han and Sim, Jiun Horng and Awang Salleh, Noorzaleha and Mohd Sidik, Shiran and Radu, Son and Sukardi, Sabrina (2009) Virulotyping of Salmonella enterica subsp. enterica isolated from indigenous vegetables and poultry meat in Malaysia using multiplex-PCR. Antonie van Leeuwenhoek, 96 (4). pp. 441-457. ISSN 0003-6072; ESSN: 1572-9699


The increased occurrence of Salmonella occurrence in local indigenous vegetables and poultry meat can be a potential health hazards. This study is aimed to detect the prevalence of twenty different virulence factors among Salmonella enterica strains isolated from poultry and local indigenous vegetables in Malaysia via an optimized, rapid and specific multiplex PCR assay. The assay encompasses a total of 19 Salmonella pathogenicity islands genes and a quorum sensing gene (sdiA) in three multiplex reaction sets. A total of 114 Salmonella enterica isolates belonging to 38 different serovars were tested. Each isolate in under this study was found to possess up to 70% of the virulence genes tested and exhibited variable pathogenicity gene patterns. Reproducibility of the multiplex PCR assay was found to be 100% and the detection limit of the optimized multiplex PCR was tested with lowest detectable concentration of DNA 0.8 pg μl−1. This study demonstrated various Salmonella pathogenicity island virulence gene patterns even within the same serovar. This sets of multiplex PCR system provide a fast and reliable typing approach based on Salmonella pathogenicity islands, thus enabling an effective monitoring of emerging pathogenic Salmonella strains as an additional tool in Salmonella surveillance studies.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Food Science and Technology
Faculty of Medicine and Health Science
DOI Number: https://doi.org/10.1007/s10482-009-9358-z
Publisher: Springer
Keywords: Virulotyping; Salmonella enterica; Salmonella pathogenicity islands (SPIs); Multiplex PCR
Depositing User: Raja Norazlinda Raja Azenam
Date Deposited: 18 Feb 2013 07:29
Last Modified: 13 Oct 2016 07:26
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10482-009-9358-z
URI: http://psasir.upm.edu.my/id/eprint/17600
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