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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 the One...
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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 acquisition...
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Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
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Published on: March 3, 2023

[NDM-1: the superbug?].

S Pittalis1, F Ferarro, V Puro

  • 1Dipartimento di Epidemiologia e Ricerca Preclinica, Istituto Nazionale per le Malattie Infettive Lazzaro Spallanzani, Roma, Italy.

Le Infezioni in Medicina
|January 4, 2012
PubMed
Summary
This summary is machine-generated.

New Delhi metallo beta-lactamase 1 (NDM 1) is a carbapenemase identified in 2008, now found globally. NDM-1 producing bacteria exhibit resistance to most antibiotics, raising concerns about a post-antibiotic era.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • The emergence of carbapenemase-producing Enterobacteriaceae poses a significant global health threat.
  • New Delhi metallo beta-lactamase 1 (NDM 1) is a novel carbapenemase first identified in 2008.

Observation:

  • NDM 1 has been reported from all continents, frequently associated with patients from the Indian subcontinent.
  • NDM-1 producing Gram-negative bacteria, primarily Enterobacteriaceae, are implicated in colonization and severe infections.

Findings:

  • NDM-1 confers resistance to a broad spectrum of antibiotics, including carbapenems.
  • Some NDM-1 isolates display resistance to nearly all available antimicrobial agents, highlighting extreme drug resistance.

Implications:

  • The rapid spread of NDM-1 necessitates urgent global surveillance and infection control strategies.
  • NDM-1 contributes to the growing crisis of antimicrobial resistance, potentially heralding a post-antibiotic era.
  • Further research into novel therapeutic approaches and effective resistance-breaking mechanisms is critical.