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[Beta-lactam and macrolide resistance in Streptococcus pneumoniae]
1Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|April 18, 2001
Summary
Penicillin-resistant Streptococcus pneumoniae strains show high resistance to beta-lactam antibiotics due to altered penicillin-binding proteins. Macrolide resistance mechanisms involve specific genes, ermB and mefA, linked to reduced susceptibility.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Context:
- Streptococcus pneumoniae is a leading cause of bacterial infections.
- Antibiotic resistance in S. pneumoniae poses a significant public health threat.
- Penicillin-resistant S. pneumoniae (PRSP) exhibits resistance to beta-lactam antibiotics.
Purpose:
- To investigate the genetic basis of high-level beta-lactam resistance in S. pneumoniae.
- To identify the prevalence of macrolide resistance genes (ermB and mefA) in clinical isolates.
- To correlate the presence of these genes with macrolide susceptibility profiles.
Summary:
- Highly resistant S. pneumoniae strains possess further alterations in pbp2x and pbp2b genes, beyond those in common PRSP.
- Detection of ermB and mefA genes via PCR in clinical isolates.
- Established a relationship between ermB/mefA gene presence and susceptibility to 14-, 15-, and 16-membered macrolides.
Impact:
- Provides insights into the molecular mechanisms of antibiotic resistance in S. pneumoniae.
- Informs clinical treatment strategies for S. pneumoniae infections.
- Contributes to understanding the evolution and spread of antibiotic resistance genes.