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[Bacteremia secondary to decubitus ulcer]
Medicina Clinica
|November 18, 1989
Summary
Decubitus ulcer bacteremia, often polymicrobial, necessitates broad-spectrum antibiotics targeting Staphylococcus aureus, Pseudomonas, Gram-negative bacilli, and Bacteroides fragilis due to unpredictable blood culture results and high mortality.
Area of Science:
- Infectious Diseases
- Microbiology
- Clinical Medicine
Context:
- Decubitus ulcers (pressure sores) are a significant source of bloodstream infections (bacteremia).
- Understanding the microbial etiology and outcomes of bacteremia in patients with decubitus ulcers is crucial for effective management.
- Many bacteremic episodes develop during hospitalization, highlighting nosocomial infection risks.
Purpose:
- To prospectively evaluate episodes of bacteremia originating from decubitus ulcers.
- To identify common causative microorganisms and assess the polymicrobial nature of these infections.
- To analyze treatment outcomes, mortality rates, and inform empirical antibiotic strategies.
Summary:
- Sixteen episodes of decubitus ulcer-induced bacteremia were analyzed.
- Common pathogens included Staphylococcus aureus, Proteus mirabilis, Pseudomonas aeruginosa, and Bacteroides fragilis; 31% of cases were polymicrobial.
- Bacteremia developed nosocomially in most patients (13/16), sometimes without local ulcer signs.
- Initial antibiotic therapy was effective in most cases (13/16).
- Mortality directly linked to bacteremia was 18%, with an overall mortality of 62%.
Impact:
- Highlights the significant morbidity and mortality associated with decubitus ulcer bacteremia.
- Emphasizes the need for empirical antibiotic therapy covering a broad spectrum of potential pathogens.
- Suggests that initial treatment should target Staphylococcus aureus, Pseudomonas, enteric Gram-negative bacilli, and anaerobes, including Bacteroides fragilis, due to unpredictable culture findings.