Clonal relationship among Acinetobacter baumannii isolates from different clinical specimens by ERIC-PCR

Area of Science:

• Microbiology
• Molecular Biology
• Epidemiology

Background:

• Acinetobacter baumannii is a significant cause of hospital-acquired infections.
• Molecular typing is crucial for tracking the spread of epidemic strains in healthcare settings.

Purpose of the Study:

• To determine the clonal diversity and circulation patterns of Acinetobacter baumannii.
• To utilize enterobacterial repetitive intergenic consensus (ERIC)-PCR for genotyping.

Main Methods:

• Analyzed 119 Acinetobacter baumannii isolates from various clinical specimens.
• Identified isolates using standard methods and MALDI-TOF MS.
• Performed ERIC-PCR on genomic DNA to assess clonal relatedness and identify genotypes.

Main Results:

• ERIC-PCR identified 82 distinct genotypic patterns, indicating high clonal diversity.
• 16 common patterns were found in 53 samples, alongside 66 unique patterns.
• ERIC types 1 and 2 were most prevalent, with limited clustering but significant genetic heterogeneity.

Conclusions:

• Multiple ERIC patterns confirm substantial genetic diversity in Acinetobacter baumannii isolates.
• Shared patterns suggest the circulation of related clones within hospitals.
• ERIC-PCR is valuable for molecular surveillance and monitoring strain emergence.