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Molecular identification and detection of virulence genes among Pseudomonas aeruginosa isolated from different

V S Nikbin1, M M Aslani, Z Sharafi

  • 1Department of Microbiology, Pasteur Institute of Iran, Iran.

Iranian Journal of Microbiology
|October 16, 2012
PubMed
Abstract

Insights

This study recommends using PCR to detect oprI, oprL, and toxA genes for identifying Pseudomonas aeruginosa. Virulence gene prevalence varied by infection site, suggesting links to pathogenicity.

Area of Science:

  • Clinical Microbiology
  • Molecular Biology
  • Infectious Diseases

Background:

  • Pseudomonas aeruginosa is a significant pathogen with diverse virulence factors.
  • Understanding these factors is crucial for identifying and managing infections.

Purpose of the Study:

  • To evaluate the efficacy of PCR for identifying clinical Pseudomonas aeruginosa using oprI, oprL, and toxA genes.
  • To investigate the association between specific virulence factors and infection manifestations.
  • To assess clonal relationships among isolates using ribotyping.

Main Methods:

  • PCR was used to determine the prevalence of virulence genes (oprI, oprL, toxA, lasB, exoS, nan1) in 268 P. aeruginosa isolates from various infections.
  • Ribotyping was employed to analyze clonal diversity in a subset of isolates.

Main Results:

  • All isolates harbored oprI, oprL, and lasB genes.
  • Significant differences in exoS prevalence were observed between pulmonary and burn isolates.
  • nan1 and toxA genes showed higher prevalence in pulmonary and burn isolates, respectively.
  • Ribotyping revealed that 87% of isolates belonged to clone A or B.

Conclusions:

  • PCR detection of oprI, oprL, and toxA genes is recommended for P. aeruginosa identification.
  • Virulence gene profiles correlate with infection type and pathogenicity.
  • Genetic patterns of virulence genes do not always align with ribotype patterns.
Keywords:
Pseudomonas aeruginosaribotypingvirulence factors

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