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Published on: February 23, 2014
Pneumococcal infection in children: rational antibiotic choice for drug-resistant Streptococcus pneumoniae
Christine C Chiou1, Kai-Sheng Hseih
1Department of Pediatrics, Kaohsiung Veterans General Hospital, No. 386, Ta-Chung First Road, Kaohsiung, Taiwan.
Insights
Penicillin-resistant Streptococcus pneumoniae is a growing concern, especially in children. Treatment strategies must consider infection site and resistance level, as beta-lactamase inhibitors are ineffective against this common pathogen.
Area of Science:
- Microbiology
- Infectious Diseases
- Pediatrics
Background:
- Streptococcus pneumoniae is a leading cause of pediatric infections like pneumonia and meningitis.
- Increasing antimicrobial resistance, particularly to penicillin, poses a significant global health challenge.
- Taiwan reports a high prevalence (70%) of penicillin-resistant S. pneumoniae in children.
Purpose of the Study:
- To address the challenge of penicillin-resistant Streptococcus pneumoniae infections.
- To highlight the mechanism of penicillin resistance in S. pneumoniae.
- To guide appropriate treatment strategies for S. pneumoniae infections based on resistance patterns.
Main Methods:
- Review of existing literature on Streptococcus pneumoniae resistance mechanisms.
- Analysis of antimicrobial susceptibility data and clinical breakpoints.
- Evaluation of treatment guidelines for S. pneumoniae infections.
Main Results:
- Penicillin resistance in S. pneumoniae is primarily due to altered penicillin-binding proteins (PBPs), not beta-lactamase production.
- Beta-lactamase inhibitors are ineffective against penicillin-resistant S. pneumoniae.
- Treatment decisions for S. pneumoniae infections require consideration of infection site and degree of resistance.
Conclusions:
- Effective treatment of penicillin-resistant S. pneumoniae necessitates tailored approaches.
- Penicillin remains a viable option for susceptible or intermediate non-CNS infections.
- Vancomycin should not be the empirical first-line treatment for all pneumococcal infections.
Abstract:
Streptococcus pneumoniae is one of the most common bacterial causes of otitis media, sinusitis, bacteremia, pneumonia and bacterial meningitis in the pediatric population. The resistance of S. pneumoniae to penicillin and other antimicrobial agents is increasing in many parts of the world. In Taiwan, extremely high prevalence (70%) of penicillin-resistant S. pneumoniae among children with nasopharyngeal carriage has been reported. The mechanism of resistance to penicillin is the alteration of penicillin binding protein (PBP) instead of the production of beta-lactamase. Thus beta-lactamase inhibitors are not the solution to the treatment of infections caused by penicillin-resistant S. pneumoniae. The adequate treatment of infections caused by penicillin-resistant S. pneumoniae should be based on (1) site of infection (2) degree of resistance. Currently, the MIC breakpoints for S. pneumoniae are divided to 2 categories; one for CNS infection and the other for non-CNS infections. For non-CNS infections caused by susceptible or intermediate S. pneumoniae, penicillin still remains the drug of choice with excellent bactericidal activity. Vancomycin should not be the first choice in treating all pneumococcal infections.
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