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An Allelotyping PCR for Identifying Salmonella enterica serovars Enteritidis, Hadar, Heidelberg, and Typhimurium
Published on: July 22, 2011
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The effective differentiation of Salmonella isolates using four PCR-based typing methods
1Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Journal of Applied Microbiology
|March 27, 2015
Summary
Molecular typing methods like ERIC, REP, and BOXAIR effectively differentiate Salmonella strains for outbreak tracing. Combining these techniques significantly improves discrimination, aiding epidemiological investigations.
Area of Science:
- Microbiology
- Molecular Biology
- Epidemiology
Background:
- Accurate Salmonella strain differentiation is crucial for tracking infectious disease outbreaks.
- Molecular typing methods offer speed and simplicity for routine laboratory analysis.
Purpose of the Study:
- To evaluate the discriminatory power of four molecular typing methods for Salmonella enterica isolates.
- To determine the effectiveness of combined methods for enhanced Salmonella strain differentiation.
Main Methods:
- Random Amplification of Polymorphic DNA (RAPD) using OPS-11, OPP-16, and P1254 primers.
- Enterobacterial Repetitive Intergenic Consensus (ERIC) PCR.
- Repetitive Extragenic Palindromic (REP) PCR.
- BOXAIR PCR (BOX repeat-based).
Main Results:
- Individual methods yielded varying discriminatory indices (DI), with REP showing the highest DI (0.991).
- Combined methods, particularly ERIC, REP, and BOXAIR, successfully differentiated all 74 Salmonella strains.
- The combination of ERIC, REP, and BOXAIR, or BOXAIR with ERIC or REP, demonstrated high discriminatory power.
Conclusions:
- Combined molecular typing methods, especially ERIC, REP, and BOXAIR, provide sufficient discrimination for epidemiological studies.
- These combined techniques are valuable for tracing the genetic relationships of Salmonella strains during outbreaks.
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