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[Pathologic anatomy of Pseudomonas aeruginosa infections in children]
Abstract:
Examinations of 143 autopsy observations of P. aeruginosa infection in children were performed. Among them, 119 patients had pneumonia, 16 affections of the alimentary tract, 8 sepsis with various localizations of the primary focus. Morphologically the affected organs presented foci of necrosis of different size with tremendous numbers of bacteria, poor leukocyte reaction, and deep circulatory disorders in the periphery. A more manifest leukocyte infiltration in foci of lesions was observed in the cases where other bacterial microflora, in addition to P. aeruginosa, was present. P. aeruginosa isolated from the organs of dead children, as a rule, belonged to immune type 1 or 2 (according to Fisher's scheme). Microbiological studies on these strains showed the most marked necrotic changes to have been caused by microbes having such factors of pathogenicity as protease and plasmocoagulase.
Insights
Autopsy findings in children reveal Pseudomonas aeruginosa (P. aeruginosa) infections often cause pneumonia and sepsis. Pathogenicity factors like protease and plasmocoagulase contribute to severe necrotic tissue damage.
Area of Science:
- Pediatric Pathology
- Microbiology
- Infectious Diseases
Context:
- Analysis of 143 autopsy cases of P. aeruginosa infection in children.
- Identified common infection sites: pneumonia (119 cases), alimentary tract (16 cases), and sepsis (8 cases).
Purpose:
- To elucidate the morphological characteristics and pathogenic mechanisms of P. aeruginosa infections in pediatric fatalities.
- To correlate bacterial virulence factors with observed pathological changes.
Summary:
- Morphological examination revealed extensive necrosis, high bacterial load, poor leukocyte response, and circulatory disturbances in affected organs.
- Co-infection with other bacteria enhanced leukocyte infiltration.
- Predominant P. aeruginosa strains belonged to immune types 1 or 2.
- Protease and plasmocoagulase were identified as key factors causing significant necrotic changes.
Impact:
- Highlights the severe pathological impact of P. aeruginosa in pediatric infections.
- Underscores the role of specific virulence factors in disease severity.
- Informs understanding of P. aeruginosa pathogenesis in vulnerable populations.