Related Experiment Video
Updated: Aug 11, 2026

Bacterial Artificial Chromosomes: A Functional Genomics Tool for the Study of Positive-strand RNA Viruses
Published on: December 29, 2015
[Trends in pediatric bacterial meningitis in Japan (2003-2004)]
Keisuke Sunakawa1, Masato Nonoyama, Tomohiro Ooishi
1Department of Infectious Diseases, Kitasato University School of Medicine.
Insights
Pediatric bacterial meningitis in Japan affects 1.13-1.6 per 1000 hospitalized children annually. Drug-resistant strains of Haemophilus influenzae and Streptococcus pneumoniae are common, necessitating specific antibiotic strategies based on age.
Area of Science:
- Pediatric Infectious Diseases
- Epidemiology
- Microbiology
Background:
- Bacterial meningitis remains a significant cause of pediatric morbidity and mortality.
- Understanding the etiological agents and their resistance patterns is crucial for effective treatment.
Purpose of the Study:
- To investigate the epidemiology of pediatric bacterial meningitis in Japan from 2003-2004.
- To identify common pathogens, their age-specific distribution, and antimicrobial susceptibility.
Main Methods:
- Retrospective survey of pediatric bacterial meningitis cases.
- Analysis of pathogen identification and antibiotic susceptibility testing data.
Main Results:
- 233 cases were identified, with the highest incidence in infants under one year.
- Haemophilus influenzae and Streptococcus pneumoniae were the most prevalent pathogens.
- High rates of drug resistance were observed in H. influenzae (65.0%) and S. pneumoniae (83.0%) isolates in 2004.
Conclusions:
- Age-specific pathogen distribution guides initial antibiotic choices.
- Emerging antimicrobial resistance necessitates careful selection of treatments, with combination therapies recommended for different age groups.
Abstract:
We surveyed the epidemiology of pediatric bacterial meningitis between January 2003 and December 2004 in Japan, with the following results: Bacterial meningitis cases numbered 233 (132 boys, 98 girls, and 3 unidentified), equivalent to 1.13-1.6 children of 1000 hospitalized in pediatrics per year. The age distribution for the infections was the highest under 1 year of age, decreasing with increasing age. Haemophilus influenzae was the most common pathogen, followed by Streptococcus pneumoniae, group B streptococcus, and Escherichia coli. The relationship between causactive pathogens and age distribution was as follows: group B. streptococcus and E. coli were major pathogens below 4 months of age and H. influenzae and S. pneumoniae were major pathogens above 4 months of age. Susceptibility tests at each facility demonstrated that 65.0% of H. influenzae isolates and 83.0% of S. pneumoniae isolates in 2004 were drug-resistant. Ampicillin and cephem antibiotics are currently effective against GBS, E. coli and Listeria so a combination of ampicillin and cephem antibiotics is used first line at many facilities for patients below 4 months of age. A combination of carbapenem which showed effective against PRSP and cephem which showed effective against H. influenzae is the first choice in childhood bacterial meningitis for patients above 4 months of age.
Related Concept Videos
Bacterial Meningitis
Bacterial Meningitis I: Introduction
Viral Meningitis
Bacterial Meningitis II: Pathophysiology
Encephalitis l: Introduction
Cryptococcal Meningitis