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[A clinical study of Pseudomonas pneumonia diagnosed by transtracheal aspiration]
Abstract:
We performed a clinical study of 16 cases (18 episodes) of Pseudomonas pneumonia by transtracheal aspiration (TTA) from April 1983 to March 1993. The isolation rate of Pseudomonas aeruginosa (P. aeruginosa) among 235 episodes of pneumonias with positive microorganism by TTA was 7.7%. All patients had one or more underlying disease. The most frequent underlying disease was chronic lower respiratory tract infection, followed by lung epidermoid cell carcinoma. More than half of the cases had been given antibiotics prior to the occurrence of pneumonia, and administration of adrenal corticosteroid, heavy smoking habit, and aspiration were seen as other predisposing factors concerning the onset of pneumonias. Monomicrobial infection of P. aeruginosa was 61.1%, and polymicrobial infection containing P. aeruginosa was 38.9%. Community-acquired pneumonia was 61.1% and hospital-acquired pneumonia was 38.9%; the rates of polymicrobial infections and prior administration of antibiotics were higher in the latter group. Mortality due to Pseudomonas pneumonia was 27.8% and the levels of serum albumin and total protein at the onset of pneumonia were significantly lower in the fatal cases than in the recovered cases. It was considered that not only general underlying disease which weaken the immunological resistance of the host, but local bronchial lesion was also important to the onset of the Pseudomonas pneumonia. Also, nutrition is an important prognostic factor on the host's side.
Insights
Pseudomonas pneumonia, often linked to underlying conditions and prior antibiotic use, has a significant mortality rate. Host factors like nutrition and bronchial health are crucial for patient outcomes.
Area of Science:
- Clinical microbiology
- Infectious diseases
- Pulmonary medicine
Context:
- Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen.
- Pneumonia remains a significant cause of morbidity and mortality worldwide.
- Understanding risk factors and outcomes of specific pneumonia types is crucial for effective treatment.
Purpose:
- To investigate the clinical characteristics, predisposing factors, and outcomes of Pseudomonas pneumonia.
- To determine the incidence and clinical significance of P. aeruginosa in pneumonia cases.
- To identify prognostic indicators for Pseudomonas pneumonia.
Summary:
- A clinical study analyzed 16 cases (18 episodes) of Pseudomonas pneumonia diagnosed via transtracheal aspiration (TTA).
- P. aeruginosa was isolated in 7.7% of pneumonia cases with positive TTA cultures.
- Common predisposing factors included chronic lower respiratory tract infections, lung cancer, prior antibiotic use, corticosteroid administration, smoking, and aspiration.
- Monomicrobial P. aeruginosa infections occurred in 61.1% of cases, while polymicrobial infections were seen in 38.9%.
- Community-acquired pneumonia accounted for 61.1% of cases, with higher rates of polymicrobial infections and prior antibiotic use in hospital-acquired pneumonia.
- The mortality rate for Pseudomonas pneumonia was 27.8%.
- Lower serum albumin and total protein levels were associated with fatal outcomes.
- Both general host defenses and local bronchial lesions were implicated in the onset of Pseudomonas pneumonia, with nutrition identified as a key prognostic factor.
Impact:
- Highlights the importance of considering Pseudomonas as a pathogen in pneumonia, especially in patients with underlying risk factors.
- Identifies key predisposing factors and clinical characteristics associated with Pseudomonas pneumonia.
- Emphasizes the prognostic significance of nutritional status and host immunity in Pseudomonas pneumonia outcomes.
- Provides valuable insights for clinicians in managing Pseudomonas pneumonia and improving patient survival rates.