Correlation between antimicrobial resistance and virulence in Klebsiella pneumoniae

C Hennequin1,2,3, F Robin4,5,6,7,8

  • 1Laboratoire de Bactériologie, CHU Clermont-Ferrand, 58, rue Montalembert, 63003, Clermont-Ferrand, France.

Insights

Klebsiella pneumoniae infections are a growing concern due to multidrug-resistant and hypervirulent strains. This review explores the complex relationship between antimicrobial resistance and pathogen virulence in K. pneumoniae.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • Klebsiella pneumoniae causes diverse infections like pneumonia and UTIs.
  • Multidrug-resistant (MDR) and hypervirulent (hvKP) strains are emerging and spreading globally.
  • Understanding K. pneumoniae virulence is limited, especially regarding the interplay with resistance.

Purpose of the Study:

  • To review current knowledge on K. pneumoniae virulence.
  • To examine the relationship between antimicrobial resistance and virulence in K. pneumoniae.
  • To highlight the challenges in treating K. pneumoniae infections.

Main Methods:

  • Literature review of scientific articles on K. pneumoniae.
  • Analysis of studies on virulence factors and resistance mechanisms.
  • Synthesis of information on genetic mobile elements like plasmids.

Main Results:

  • Hypervirulent K. pneumoniae (hvKP) strains are increasingly recognized.
  • Antimicrobial resistance in K. pneumoniae is often linked to mobile genetic elements, such as plasmids.
  • The interaction between resistance and virulence in K. pneumoniae remains poorly understood.

Conclusions:

  • The emergence of MDR and hvKP strains poses a significant threat.
  • Further research is needed to elucidate the interplay between resistance and virulence.
  • Effective treatment strategies for K. pneumoniae infections require addressing both resistance and virulence.

Related Concept Videos

Mechanism of Antibiotic Resistance in MRSA01:25

Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and...
78
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
29
Regulation of Bacterial Virulence01:28

Regulation of Bacterial Virulence

Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...
17
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
873
Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
1.9K
Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
2.0K