Abstract

Antimicrobial resistance among pathogenic organisms is now a persistent problem and of tremendous public health care concern around the globe. These pathogens are able to develop mechanisms of resistance, the antimicrobial agents that were at one time the drug of choice. They continue to develop various mechanisms of resistance either by intrinsic or acquired, and have been able to transfer and accept different resistance genes, given rise to multi-drugs resistance bacteria called superbugs. This new phenomenon has caused an increase in the incidence of nosocomial infections making the treatment problematic for the health care providers. Resistance to antimicrobial agents is fast becoming a norm and is an enormous challenge worldwide. Key words: Antimicrobial resistance, antimicrobial agent, pathogen, mechanism, superbug.

Highlights

  • Issues of resistance of pathogens to antimicrobial agentsAntimicrobial resistance among pathogenic organisms is a persistent problem and of tremendous public health care concern around the globe

  • Antimicrobial resistance developed by pathogenic organisms is a global menace and has escalated over the years by the emergence of multi-drug resistant strains among these pathogens (Gould et al, 2010; Lister et al, 2009)

  • Examples of clinically important pathogens that are increasingly becoming multi-drug resistance to antibiotics in use are Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae and Enterococcus faecalis

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Summary

Issues of resistance of pathogens to antimicrobial agents

Antimicrobial resistance among pathogenic organisms is a persistent problem and of tremendous public health care concern around the globe These pathogens are able to develop mechanisms of resistance, the antimicrobial agents that were at one time the drug of choice. They continue to develop various mechanisms of resistance either by intrinsic or acquired, and have been able to transfer and accept different resistance genes, given rise to multi-drugs resistance bacteria called superbugs. This new phenomenon has caused an increase in the incidence of nosocomial infections making the treatment problematic for the health care providers.

INTRODUCTION
MECHANISMS OF ACTION OF ANTIMICROBIAL AGENTS
Inhibition of protein synthesis
Injury to the plasma membrane
Inhibition of nucleic acid synthesis
Inhibition of essential metabolites synthesis
MECHANISMS OF ANTIMICROMIBIAL RESISTANCE
Resistance based on altered receptors for a drug
Decreased entry of antibiotics
Resistance by drug inactivation or destruction
Synthesis of resistance or alternative pathways
CONCLUSION

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