African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5215

Full Length Research Paper

Multiplex polymerase chain reaction (PCR) assays for the detection of Enterobacteriaceae in clinical samples

Deepa Anbazhagan1, Geethanjali Gausillia Kathirvalu1, Marzida Mansor2, Gracie Ong Siok Yan2, Mohd Yasim Yusof1 and Shamala Devi Sekaran1*
1Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.  2Department of Anaesthesiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Email: [email protected]

  •  Accepted: 26 April 2010
  •  Published: 04 June 2010


The accurate and rapid identification of bacteria in the enteric tract is necessary for early treatment. In this study, we describeD a novel system which consists of a multiplex polymerase chain reaction (PCR) to simultaneously identify a group of six Enterobacteriaceae members including Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Citrobacter spp., Enterobacter cloacae andSalmonella typhi. Genus and species specific primers were designed for this group of pathogens and conventional multiplex PCR and SYBR green based real time PCR assays were performed to detect these pathogens. All the samples were analysed with a eubacterial real-time PCR assay that enables detection of bacterial DNA and then detection of the organisms was determined using genus and species specific PCR assays. This assay was evaluated using clinical specimens and was found to be quite sensitive and specific. Their PCR results matched with the conventional culture identifications. The conventional and SYBR green real time multiplex PCR assays takes only 3 h to be performed and has the potential to replace the conventional culture technique and thus can speed up the treatment process. This technique has the potential to be a valuable diagnostic tool for simultaneous identification of E. coli, K. pneumoniae, P. mirabilis, Citrobacter spp., E. cloacae and S. typhi.


Key words: Multiplex real time PCR, EnterobacteriaceaeEscherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Citrobacter spp., Enterobacter cloacae, Salmonella typhi