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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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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
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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...
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Generic intravenous (IV) drugs are considered bioequivalent to their branded counterparts due to their 100% bioavailability upon administration. However, variations in stability among different drug products can significantly influence their therapeutic performance, even if they are pharmaceutically equivalent.Cefuroxime, a prophylactic antimicrobial, is often used as a single-dose IV injection for patients undergoing coronary artery bypass grafting surgery. A 3 g dose typically provides...
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Time-Lapse Epifluorescence Microscopy Imaging of Pseudomonas aeruginosa and Staphylococcus aureus Heterogeneous Phenotypes
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[New antibiotics - standstill or progress].

J Rademacher1, T Welte2

  • 1Klinik für Pneumologie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 306125, Hannover, Deutschland. rademacher.jessica@mh-hannover.de.

Medizinische Klinik, Intensivmedizin Und Notfallmedizin
|March 19, 2017
PubMed
Summary
This summary is machine-generated.

Six new antibiotics combat rising antimicrobial resistance. These drugs, including novel cephalosporins and agents targeting resistant bacteria like MRSA, offer crucial alternatives to combat infections, easing pressure on existing treatments.

Keywords:
Beta-lactam resistanceCephalosporinsDrug resistance, bacterialInfectionMRSA

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pharmacology

Background:

  • Antibiotic resistance is a growing global health crisis.
  • A significant gap exists between the rise of resistant pathogens and the development of new antimicrobial drugs.
  • The pipeline for novel antibiotics has been stagnant for over a decade.

Purpose of the Study:

  • To review and present six recently developed antibiotics.
  • To highlight their potential efficacy against resistant bacterial strains.
  • To discuss their role in managing the increasing threat of antimicrobial resistance.

Main Methods:

  • Review of existing literature and expert opinions on new antibiotic agents.
  • Analysis of the spectrum of activity and target pathogens for each new drug.
  • Assessment of the potential impact on antibiotic selection pressure.

Main Results:

  • Ceftaroline and ceftobiprole (5th gen cephalosporins) show high activity against Methicillin-resistant Staphylococcus aureus (MRSA).
  • Solithromycin (fluoroketolide) is effective against macrolide-resistant pathogens.
  • Tedizolid (oxazolidinone) targets linezolid-resistant MRSA.
  • Ceftolozane/tazobactam and ceftazidime/avibactam offer broad-spectrum activity against Gram-negative pathogens, including those with extended-spectrum beta-lactamases (ESBLs).

Conclusions:

  • The introduction of these six new antibiotics provides vital options for treating infections caused by resistant bacteria.
  • These agents can help alleviate the selection pressure on commonly used antibiotics, particularly carbapenems.
  • Continued focus on novel antibiotic development is essential to address the alarming rise of resistant Gram-negative pathogens worldwide.