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[The pathologic anatomy of important forms of bacterial pneumonia]
1Lehrstuhl für Pathologische Anatomie des Leningrader Pädiatrischen Medizinischen Instituts, Leningrad, UdSSR.
Abstract:
Postmortem examinations were conducted on 7,952 cases with acute inflammatory processes of respiratory organs, among them 452 adults, between 1949 and 1988. Bacteria had been responsible for 87.5%, of these pneumonia cases, including Klebsiella for 15.3%, Pseudomonas for 13.5%, staphylococci for 9.9%, pneumococci for 4%, streptococci for 3.9% and Haemophilus for 0.7%. Other bacterial species of lower pathogenicity were recorded from 24.4% of all individuals who had died with pneumonia and mixed bacterial flora from another 29.3%. Pneumococcal and streptococcal forms of pneumonia were predominant in untreated patients. Staphylococci and gram-negative bacteria were primarily recorded from inflammatory foci, following penicillin treatment. Macroscopic and microscopic peculiarities are discussed in greater detail, together with aspects relating to the pathogenesis of forms of pneumonia caused by different pathogens.
Insights
Bacterial pneumonia was common, with Klebsiella and Pseudomonas frequently identified. Antibiotic treatment shifted pathogen prevalence, highlighting the importance of understanding bacterial roles in respiratory disease.
Area of Science:
- Pathology
- Microbiology
- Public Health
Context:
- This study analyzes postmortem data from 7,952 cases with acute respiratory inflammation between 1949 and 1988.
- Focuses on bacterial etiologies of pneumonia in adults.
Purpose:
- To identify the bacterial pathogens responsible for pneumonia deaths.
- To investigate how antibiotic treatment influences the prevalence of specific bacteria in pneumonia cases.
- To describe macroscopic and microscopic features and pathogenesis related to different bacterial pneumonia types.
Summary:
- Bacteria caused 87.5% of pneumonia deaths, with Klebsiella (15.3%) and Pseudomonas (13.5%) being most common.
- Untreated patients predominantly had pneumococcal and streptococcal pneumonia.
- Penicillin treatment was associated with increased detection of staphylococci and gram-negative bacteria in inflammatory foci.
Impact:
- Provides historical data on bacterial pneumonia epidemiology and the impact of early antibiotic use.
- Informs understanding of pathogen shifts in response to treatment.
- Contributes to knowledge on the pathogenesis of bacterial pneumonia.