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Updated: Sep 9, 2026

Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants
Published on: May 4, 2018
[Gene examination methods (detection and genotyping of resistant genes)--multiple-drug-resistant Pseudomonas
Abstract:
Pseudomonas aeruginosa has been regarded as one of the most stubborn pathogens that easily acquire resistance to various antimicrobial agents. Recently, several clinical isolates that have acquired multiple-resistance to carbapenems, fluoroquinolones, and newly developed aminoglycosides such as amikacin have been reported. Thus, the "drug-resistant P. aeruginosa" was designated as a "class 4 pathogen" in the new "Law Concerning the Prevention of Infectious Diseases and Medical Care for Patients with Infections" in Japan. It is generally considered that no medical facility can escape from severe attack by both multiple-drug resistant gram-positive cocci such as MRSA and gram-negative rods including P. aeruginosa in the 21st century. Therefore, emergency countermeasures should be anticipated to prevent further proliferation of these multiple-drug resistant pathogens.
Insights
Drug-resistant Pseudomonas aeruginosa is a growing threat, exhibiting resistance to multiple antibiotics. New countermeasures are urgently needed to combat this "class 4 pathogen" and prevent its spread in healthcare settings.
Area of Science:
- Microbiology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- Pseudomonas aeruginosa is a resilient pathogen known for developing resistance to antimicrobial drugs.
- Clinical isolates demonstrating multidrug resistance to carbapenems, fluoroquinolones, and amikacin have emerged.
- Drug-resistant P. aeruginosa is classified as a 'class 4 pathogen' in Japan due to its significant threat.
Purpose of the Study:
- To highlight the increasing challenge posed by multidrug-resistant Pseudomonas aeruginosa.
- To emphasize the need for urgent strategies against this formidable pathogen.
Main Methods:
- Review of recent clinical findings on drug-resistant P. aeruginosa.
- Analysis of the classification and implications of 'class 4 pathogens' in Japan.
Main Results:
- Emergence of P. aeruginosa strains resistant to carbapenems, fluoroquinolones, and amikacin.
- Designation of drug-resistant P. aeruginosa as a 'class 4 pathogen' under Japanese law.
Conclusions:
- Multidrug-resistant pathogens, including P. aeruginosa and MRSA, pose a severe threat to medical facilities.
- Emergency countermeasures are essential to prevent the proliferation of these resistant bacteria.
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