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Introduction: Evolving needs in respiratory tract infections.

Lionel A. Mandell1

  • 1Division of Infectious Diseases, McMaster University, Hamilton, Ontario, Canada.

Clinical Microbiology and Infection : the Official Publication of the European Society of Clinical Microbiology and Infectious Diseases
|March 1, 2002
PubMed
Summary

Antibiotic resistance in pneumonia is rising, particularly with Streptococcus pneumoniae and Staphylococcus aureus. New antimicrobials are needed to combat resistant bacteria and atypical pathogens.

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Relationship of Penicillin Resistance to Mortality in Pneumococcal Pneumonia.

Current infectious disease reportsยท2001
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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pharmacology

Background:

  • Antibiotic resistance in respiratory pathogens is a growing clinical concern.
  • Atypical pathogens like Mycoplasma pneumoniae, Chlamydia pneumoniae, and Legionella spp. are increasingly important in pneumonia treatment.
  • Resistance mechanisms include enzyme production, reduced drug access, efflux pumps, target modification, and pathway bypassing.

Purpose of the Study:

  • To review the clinical relevance of antibiotic resistance in pneumonia.
  • To discuss the mechanisms of antibiotic resistance in key pathogens.
  • To highlight the need for novel antimicrobial agents.

Main Methods:

  • Literature review of recent clinical and microbiological studies.
  • Analysis of resistance mechanisms in Streptococcus pneumoniae, Staphylococcus aureus, and Gram-negative rods.

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  • Discussion of atypical pathogens' role in pneumonia.

    • Main Results:

    • Penicillin resistance in Streptococcus pneumoniae involves altered penicillin-binding proteins, potentially conferring cephalosporin resistance.
    • Multidrug resistance is observed in pneumococci, with macrolide resistance mediated by the ermAM gene.
    • Staphylococcus aureus resistance to beta-lactams is linked to the mecA gene and PBP2a.
    • Atypical pathogens pose a significant challenge in pneumonia treatment.

    Conclusions:

    • There is an urgent need for antimicrobials with enhanced activity against Gram-negative rods, atypical pathogens, and Gram-positive cocci.
    • Understanding resistance mechanisms is crucial for developing effective treatment strategies.
    • Continued surveillance and development of new antibiotics are essential for managing pneumonia effectively.