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Related Concept Videos

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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Bacterial Gastroenteritis

Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
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Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...
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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 acquisition...
Obedience01:08

Obedience

According to obedience research, we may harm others under the forceful pressures of an authority figure (Milgram, 1974). How about if the inappropriate orders were delivered with less force? The increasing interdependence between nurses and physicians compelled Hofling and his colleagues to explore nurses’ reactions to a potentially harmful medical request made by the perceived authority figure, the doctor (Hofling, Brotzman, Dalrymple, Graves, & Pierce, 1966). In this situation, obedience...
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Updated: May 31, 2026

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures
09:54

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures

Published on: October 3, 2016

ESBLs: A Clear and Present Danger?

Rishi H-P Dhillon1, John Clark

  • 1Department of Medical Microbiology, Charing Cross Hospital, Imperial College Healthcare NHS Trust, Fulham Palace Road, London W6 8RF, UK.

Critical Care Research and Practice
|July 19, 2011
PubMed
Summary
This summary is machine-generated.

Extended spectrum beta-lactamases (ESBLs) are enzymes from Gram-negative bacteria causing antibiotic resistance. Infections from ESBL-producing organisms increase health risks and costs, demanding urgent attention.

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Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 2. General Practices
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Last Updated: May 31, 2026

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures
09:54

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures

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Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 2. General Practices
08:53

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 2. General Practices

Published on: October 3, 2016

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • Extended spectrum beta-lactamases (ESBLs) are enzymes produced by Gram-negative bacteria.
  • These enzymes confer resistance to commonly prescribed antibiotics, escalating treatment challenges.
  • ESBL-producing organisms are a significant global public health concern due to increased morbidity, mortality, and healthcare costs.

Purpose of the Study:

  • To provide a comprehensive overview of the current landscape of ESBLs.
  • To focus on the epidemiology and management strategies for infections caused by ESBL-producing bacteria.

Main Methods:

  • Literature review of current research on ESBLs.
  • Analysis of epidemiological data on ESBL prevalence.
  • Synthesis of information on clinical management guidelines for ESBL infections.

Main Results:

  • ESBLs are increasingly prevalent worldwide.
  • Infections caused by ESBL-producing bacteria are associated with poorer patient outcomes.
  • The diminishing antibiotic pipeline exacerbates the threat posed by ESBLs.

Conclusions:

  • ESBLs represent a critical threat to public health.
  • Effective management and control strategies are essential to combat the rising tide of ESBL infections.
  • Continued research and surveillance are crucial for addressing this evolving challenge.