Clonal distribution of multidrug-resistant Enterobacter cloacae

Area of Science:

• Microbiology
• Genetics
• Epidemiology

Background:

• Multidrug-resistant Enterobacter cloacae poses a significant global health threat.
• Understanding the population structure of E. cloacae is crucial for controlling its spread.

Purpose of the Study:

• To investigate the clonal diversity of multidrug-resistant Enterobacter cloacae isolates worldwide.
• To determine if specific successful clones are associated with the global dissemination of E. cloacae.

Main Methods:

• A multilocus sequence typing (MLST) scheme utilizing 7 housekeeping genes was employed.
• Fifty clinical isolates of E. cloacae from diverse global origins and time periods were analyzed.
• The ampC gene was sequenced for precise isolate identification.

Main Results:

• High clonal diversity was observed among the 50 E. cloacae isolates, with 44 distinct sequence types identified.
• Three major clonal lineages were highlighted within the studied population.
• Sequencing the ampC gene significantly improved the reliability of the MLST scheme.

Conclusions:

• The global spread of multidrug-resistant E. cloacae is characterized by high genetic diversity rather than a single dominant clone.
• The identification of distinct clonal lineages provides insights into the evolutionary dynamics of E. cloacae.
• Integrating ampC gene sequencing into MLST protocols enhances the accuracy of E. cloacae typing and surveillance efforts.