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Related Concept Videos

Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

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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...
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Mechanism of Antibiotic Resistance in MRSA01:25

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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...
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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...
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Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These...
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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
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Antibiotic Resistance Spreads Internationally Across Borders.

Tamar F Barlam1, Kalpana Gupta2

  • 1Associate Professor of Medicine at the Boston University School of Medicine. She is a member of the Infectious Disease section at the Boston Medical Center where she directs antibiotic stewardship efforts.

The Journal of Law, Medicine & Ethics : a Journal of the American Society of Law, Medicine & Ethics
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Antibiotic-resistant bacteria emerge from antibiotic exposure in humans, animals, and the environment. Global spread necessitates international collaboration on guidelines, surveillance, and infection control to curb resistant bacteria.

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Area of Science:

  • Microbiology
  • Public Health
  • Epidemiology

Background:

  • Antibiotic resistance (ABR) arises from bacterial exposure to antibiotics in medical, agricultural, and industrial settings.
  • Resistant bacteria disseminate globally via international travel, trade of animals and products, and environmental pathways.
  • The increasing prevalence of ABR poses a significant threat to global health and requires urgent attention.

Purpose of the Study:

  • To highlight the mechanisms of antibiotic-resistant bacteria development and spread.
  • To emphasize the critical need for international cooperation in combating antibiotic resistance.
  • To outline key strategies for reducing the emergence and amplification of resistant bacteria.

Main Methods:

  • This study is a review and synthesis of current knowledge on antibiotic resistance.
  • It analyzes the pathways of resistant bacteria dissemination.
  • It identifies essential components for a global strategy against antibiotic resistance.

Main Results:

  • Antibiotic use in humans, animals, and industry drives the selection of resistant bacteria.
  • Global travel and trade facilitate the rapid spread of these resistant strains worldwide.
  • Environmental contamination serves as a reservoir and transmission route for antibiotic-resistant bacteria.

Conclusions:

  • Effective control of antibiotic resistance requires a One Health approach, integrating human, animal, and environmental health strategies.
  • International collaboration is crucial for implementing standardized surveillance and infection control measures.
  • Adherence to sensible antibiotic treatment guidelines and restrictions is paramount in reducing the emergence and spread of resistant bacteria.