Microbial pathogenicity and virulence mediated by integrons on Gram-positive microorganisms

Area of Science:

• Microbiology
• Molecular Biology
• Public Health

Background:

• Gram-positive microorganisms, including 'Super Bugs,' pose significant public health threats due to increasing infections and treatment failures.
• Integrons are key genetic elements facilitating horizontal gene transfer and the acquisition of antibiotic resistance.
• Research on integrons predominantly focuses on Gram-negative bacteria, leaving their role in Gram-positive pathogens under-investigated.

Purpose of the Study:

• To review the occurrence and impact of integrons in Gram-positive microorganisms.
• To summarize the role of integrons in antibiotic resistance and virulence in typical Gram-positive pathogens.
• To analyze integron distribution and resistance gene cassettes in South China and other Asian countries.

Main Methods:

• Literature review of surveillance studies on integrons in Gram-positive microorganisms.
• Analysis of data from South China and other Asian countries focusing on integron occurrence and resistance gene cassettes.
• Synthesis of information on pathogenicity and virulence mediated by integrons in Staphylococcus, Enterococcus, Corynebacterium, and Streptococcus.

Main Results:

• Integrons are prevalent in Gram-positive pathogens, contributing to the evolution and spread of antibiotic resistance.
• Specific integron structures and associated gene cassettes identified in various Gram-positive species.
• Evidence suggests integrons enhance the pathogenicity and virulence of Gram-positive 'Super Bugs.'

Conclusions:

• Integrons are significant drivers of antibiotic resistance in Gram-positive bacteria.
• Further research is needed to fully understand the clinical implications of integrons in Gram-positive pathogens.
• Surveillance and control strategies targeting integrons are crucial for combating antimicrobial resistance in Gram-positive 'Super Bugs'.