[Microflora colonizing pleural drains after thoracic surgery]
Izabela Korona-Głowniak1, Paweł Rybojad, Anna Malm
1Katedry i Zakładu Mikrobiologii Farmaceutycznej, Akademii Medycznej, Lublinie.
Abstract:
The aim of this paper was to analyse aerobic and anaerobic bacterial flora colonizing pleural drains in 32 patients with lung tumor undergoing pulmonary resection and receiving antimicrobial prophylaxis. Fluid from pleural drains was taken up on the day of operation and on the 3-rd or 4-th day after the operation. Significant number of aerobic bacteria, mainly methicillin-resistant coagulase-negative staphylococci and multidrug resistant Gram-negative rods, were isolated from 30 (46.9%) specimens. Lower number of anaerobic bacteria were found in 24 (37.5%) specimens. Colonization of the pleural drains does not mean infection, (in only one patient isolated Pseudomonas aeruginosa could be the etiologic agent of infection) however knowledge about bacterial species found in drain fluid in a local population and drug susceptibility of isolated strains allows to propose effective antimicrobial prophylaxis.
Insights
This study analyzed bacterial colonization in pleural drains of lung cancer patients. Findings reveal common aerobic and anaerobic bacteria, informing targeted antimicrobial prophylaxis strategies.
Area of Science:
- Medical Microbiology
- Thoracic Surgery
- Infectious Diseases
Background:
- Pleural drains are used post-pulmonary resection for lung tumors.
- Antimicrobial prophylaxis is standard care, but local flora patterns require investigation.
- Bacterial colonization of drains may not always indicate infection.
Purpose of the Study:
- To analyze aerobic and anaerobic bacterial flora colonizing pleural drains.
- To identify prevalent bacterial species and their antimicrobial susceptibility.
- To inform and optimize antimicrobial prophylaxis in lung tumor patients undergoing resection.
Main Methods:
- Prospective analysis of pleural drain fluid from 32 patients with lung tumors.
- Specimens collected on the day of operation and 3-4 days post-operation.
- Aerobic and anaerobic bacterial cultures performed, with susceptibility testing.
Main Results:
- Aerobic bacteria isolated from 46.9% of specimens, including methicillin-resistant coagulase-negative staphylococci and multidrug-resistant Gram-negative rods.
- Anaerobic bacteria found in 37.5% of specimens.
- Only one case (Pseudomonas aeruginosa) suggested a potential infection.
Conclusions:
- Pleural drain colonization is common but does not equate to infection.
- Understanding local bacterial flora and drug susceptibility is crucial.
- Data supports the development of effective, targeted antimicrobial prophylaxis protocols.
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