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Published on: February 23, 2014
[Microbiological etiology in children with community acquired pneumonia]
Ying-Jian Wang1, Jie Liu, Fang Fang
1Kunming Maternal and Child Health Hospital, Kunming 650031, China. wyj0871@sina.com
Objective:
To study the distribution of pathogenic microorganisms of community acquired pneumonia (CAP) in children.
Methods:
Respiratory secretion and blood specimens were collected in 1167 children with CAP within 4 hrs of admission. Mycoplasma pneumonia and Chlamydia trachomatis were detected by RT-PCR in respiratory secretion specimens. Respiratory syncytial virus (RSV-IgM) and Adenovirus (ADV-IgM) were tested using ELISA in blood samples.
Results:
A total of 308 strains of bacteria were isolated from the respiratory tract secretions, with gram positive strains of 53.6% and gram negative strains of 46.4%. The top five bacteria strains detected were Streptococcus pneumoniae (35.1%), Escherichia coli (11.7%), Staphylococcus aureus (8.8%), Klebsiella pneumonia (6.5%) and Moraxelle catarrhalis (5.8%) in turn. Beta-lactamase and ESBLs producing strains accounted for 30.1% in the top five bacteria strains. The non-bacteria pathogens were found in 281 specimens (24.1%). Respiratory syncytial virus accounted for the most prevalent pathogen (19.3%). The mixed infection of respiratory syncytial virus and Streptococcus pneumoniae was common (35.2%). The infection rate from most of pathogenic microorganisms among children under the age of one was higher than that in children over one year old.
Conclusions:
Respiratory syncytial virus and Streptococcus pneumoniae are the major pathogens of CAP in children. The risk of pathogenic microorganism infections in children under the age of one is higher than that of children over one year old.
Insights
Respiratory syncytial virus and Streptococcus pneumoniae are key pathogens causing community-acquired pneumonia (CAP) in children. Infants under one year old face a higher infection risk from these and other microorganisms.
Area of Science:
- Pediatric Infectious Diseases
- Microbiology
- Respiratory Medicine
Context:
- Community-acquired pneumonia (CAP) is a significant cause of childhood illness.
- Identifying causative pathogens is crucial for effective treatment and prevention strategies.
- Understanding microbial distribution aids in developing targeted interventions.
Purpose:
- To investigate the prevalence and distribution of various pathogenic microorganisms responsible for CAP in a pediatric population.
- To identify the most common bacterial and viral agents contributing to CAP in children.
- To assess the impact of age on the susceptibility to specific pathogens.
Summary:
- A study of 1167 children with CAP identified Streptococcus pneumoniae (35.1%) and Respiratory Syncytial Virus (RSV) (19.3%) as the most prevalent pathogens.
- Bacterial isolates included Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Moraxella catarrhalis, with 30.1% of top strains exhibiting antimicrobial resistance.
- RSV and Streptococcus pneumoniae co-infection was observed in 35.2% of cases, and children under one year old showed a higher infection rate.
Impact:
- This research highlights RSV and Streptococcus pneumoniae as primary drivers of pediatric CAP.
- Findings underscore the increased vulnerability of infants to microbial infections.
- Results inform clinical practice regarding empirical treatment and infection control measures for pediatric CAP.
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