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Published on: May 9, 2018
THE SPECIFIC POLYSACCHARIDE CONTENT OF PNEUMONIC LUNGS.
A W Frisch1, J T Tripp, C D Barrett
1Departments of Bacteriology and Clinical Pathology, College of Medicine' Wayne University, Detroit, and the Michigan Department of Health Laboratories, Lansing.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Type III pneumonia shows significantly higher polysaccharide levels in lungs compared to other types. This suggests pneumococcal capsular polysaccharide production influences disease severity and outcomes.
Area of Science:
- Microbiology
- Pathology
- Immunology
Background:
- Pneumonia is a significant cause of morbidity and mortality.
- Streptococcus pneumoniae is a common bacterial cause of pneumonia.
- The capsular polysaccharide of Streptococcus pneumoniae plays a role in virulence.
Purpose of the Study:
- To quantify and compare the specific polysaccharide content in pneumonic lungs across different types of pneumonia.
- To investigate the relationship between capsular polysaccharide production and disease outcome in Type III pneumonia.
Main Methods:
- Analysis of polysaccharide content in lung tissue samples from fatal pneumonia cases.
- Comparison of polysaccharide levels in Type III pneumonia versus other types (I, II, VII, VIII).
- Investigation of polysaccharide yields from sputum and lung exudates.
Main Results:
- Type III pneumonia lungs exhibited 60-fold higher specific polysaccharide content than other types.
- Highest polysaccharide concentrations were found in gray hepatized lobes.
- Comparable polysaccharide yields were obtained from sputum and lungs of fatal cases.
- Preliminary peptic digestion of lung exudates enhanced polysaccharide recovery.
Conclusions:
- The high polysaccharide content in Type III pneumonia supports the hypothesis linking pneumococcal capsular polysaccharide production to disease outcome.
- Findings suggest capsular polysaccharide is a key factor in the pathogenesis and severity of Type III pneumococcal pneumonia.
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