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Published on: February 23, 2014
[Etiologic factors of pleural empyema as a potential source of nosocomial infections]
Anna Jezierska-Anczuków1, Piotr Rudziński, Marta Wróblewska
1Zakładu Mikrobiologii, Instytutu Gruźlicy i Chorób Płuc w Warszawie. a.jezierska@igichp.edu.pl
Abstract:
Pleural empyema still comprises an important therapeutic problem despite the availability of effective antibiotic therapy. This disorder is characterised by 20% mortality rate. Moreover, the involvement of multi-drug resistant bacterial strains may pose a risk of a nosocomial spread to other hospitalised patients. In the present study we have analysed 184 bacterial strains isolated from 63 patients with pleural empyema. A predominance of aerobic bacteria was detected, both Gram-positive cocci and Gram-negative bacilli. Staphylococci isolated from the clinical samples were characterised by a high percentage of strains resistant to gentamicin (86.3%) and methicillin (38.2%). The other important etiological agents were Pseudomonas aeruginosa and Gram-negative enteric rods of the Enterobacteriaceae family. Only 1 strain of anaerobic bacteria was detected. The enteric bacilli were characterised by a low percentage of isolates susceptible to most of the tested antibiotics (< 60%), with an exception of ciprofloxacin (68%) and imipenem (100%). These multi-drug resistant strains may spread nosocomially to other patients.
Insights
Pleural empyema treatment is challenging due to antibiotic resistance. This study found aerobic bacteria, particularly Staphylococci and Gram-negative bacilli, are common causes, with high resistance rates to common antibiotics.
Area of Science:
- Microbiology
- Infectious Diseases
- Pulmonology
Context:
- Pleural empyema remains a significant therapeutic challenge.
- High mortality rates (20%) and nosocomial spread risk exist.
- Antibiotic resistance complicates treatment strategies.
Purpose:
- To analyze bacterial strains isolated from pleural empyema patients.
- To identify predominant aerobic and anaerobic bacteria.
- To assess antibiotic susceptibility patterns of isolated strains.
Summary:
- 184 bacterial strains from 63 pleural empyema patients were analyzed.
- Aerobic bacteria, including Gram-positive cocci and Gram-negative bacilli, predominated.
- Staphylococci showed high resistance to gentamicin (86.3%) and methicillin (38.2%).
- Pseudomonas aeruginosa and Enterobacteriaceae were significant pathogens.
- Enteric bacilli exhibited low susceptibility to many antibiotics, except ciprofloxacin and imipenem.
Impact:
- Highlights the prevalence of multi-drug resistant organisms in pleural empyema.
- Informs clinical decision-making for empirical antibiotic therapy.
- Underscores the risk of nosocomial spread of resistant strains.
- Emphasizes the need for antimicrobial stewardship in managing pleural infections.
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