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Pneumococcal types 14 and 18 caused the most infections in young children, including pneumonia and meningitis. Type 1 strains were most common overall in this patient survey.
Area of Science:
- Microbiology
- Epidemiology
- Infectious Diseases
Background:
- Pneumococci are a leading cause of bacterial infections worldwide.
- Understanding pneumococcal type distribution is crucial for effective prevention and treatment strategies.
- Previous studies have highlighted varying prevalence of different pneumococcal serotypes.
Purpose of the Study:
- To determine the type distribution of pneumococci in a cohort of 462 patients.
- To identify specific pneumococcal types associated with severe infections in children under five.
- To explore potential pre-disposing factors for pneumococcal infections.
Main Methods:
- Retrospective analysis of pneumococcal isolates from 462 patients.
- Serotyping of isolated pneumococci to determine specific types.
- Clinical data review to correlate infection types and patient demographics.
- Statistical analysis to identify common infection types and pre-disposing factors.
Main Results:
- Streptococcus pneumoniae type 1 was the most frequently isolated serotype overall.
- Pneumococcal types 14 and 18 were most prevalent in children under five years of age.
- Common infections included pneumonia, meningitis, and septicaemia.
- Pre-disposing factors identified were heavy drinking, head injury, respiratory infections, heart disease, liver disease, malignancy, viral infections, and spleen abnormalities.
Conclusions:
- Specific pneumococcal serotypes, particularly types 14 and 18, pose a significant risk to young children.
- Pneumonia, meningitis, and septicaemia are the most common severe outcomes of pneumococcal infections.
- Multiple underlying health conditions and lifestyle factors may predispose individuals to pneumococcal disease.
Abstract:
The type distribution of pneumococci isolated from 462 patients was determined. In this survey type 1 strains were the most numerous but type 14 and type 18 caused the most infections in children under five years of age. The most common infections were pneumonia, meningitis or septicaemia. Possible pre-disposing causes included a history of heavy drinking, head injury, bronchitis or other chest infection, heart disease, liver disease, malignancy, viral infection or abnormality of the spleen.