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Updated: May 25, 2025
Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice
Published on: March 17, 2014
Bronchial bacterial colonization and the susceptibility of isolated bacteria in patients with lung malignancy
Sabrina Petrovic1, Bojana Beovic2,3, Viktorija Tomic3,4
11Surgery Bitenc, Medical Centre Ljubljana (MCL), Ljubljana, Slovenia.
Background:
Postoperative pneumonia (POP) remains a leading cause of mortality following lung surgery. Recent studies have confirmed that the respiratory tract below the vocal cords is not sterile and often harbours potentially pathogenic microorganisms (PPMs), putting patients with lung malignancies at an increased risk for pulmonary infections.
Patients And Methods:
The study analysed 149 patients who underwent bronchoscopy for lung lesions suspected to be lung cancer. Protected specimen brush (PSB) samples were obtained during bronchoscopy prior to any specific treatment. Bacterial identification and antimicrobial susceptibility testing were conducted on the isolated strains.
Results:
Bacterial colonization was detected in 88.6% of patients, with 21.5% carrying PPMs. Notably, patients with type 2 diabetes exhibited a higher rate of PPM colonization compared to others. Antibiotic susceptibility testing showed no significant differences in efficacy between amoxicillin with clavulanic acid and first-generation cephalosporin in both colonized patients and those with PPMs. Importantly, no multidrug-resistant bacteria were identified.
Conclusions:
Our findings indicate a slightly lower PPM colonization rate compared to previous studies, possibly due to the unique geographic characteristics of the study population. The absence of significant differences in bacterial susceptibility between the two tested antibiotics highlights the need for further research to refine perioperative infection management strategies.
Insights
Postoperative pneumonia is a risk after lung surgery. This study found potentially pathogenic microorganisms in 21.5% of patients, with no multidrug-resistant bacteria identified, informing infection management strategies.
Area of Science:
- Pulmonary Medicine
- Infectious Diseases
- Surgical Oncology
Background:
- Postoperative pneumonia (POP) is a significant cause of mortality after lung surgery.
- The lower respiratory tract harbors potentially pathogenic microorganisms (PPMs), increasing infection risk in lung cancer patients.
Purpose of the Study:
- To investigate bacterial colonization and antibiotic susceptibility in patients undergoing bronchoscopy for suspected lung cancer.
- To identify potentially pathogenic microorganisms (PPMs) in the lower respiratory tract prior to treatment.
Main Methods:
- 149 patients with suspected lung cancer underwent bronchoscopy.
- Protected specimen brush (PSB) samples were collected for bacterial analysis.
- Antimicrobial susceptibility testing was performed on isolated bacterial strains.
Main Results:
- Bacterial colonization was detected in 88.6% of patients; 21.5% carried PPMs.
- Type 2 diabetes patients showed higher PPM colonization rates.
- No significant difference in antibiotic efficacy between amoxicillin/clavulanic acid and first-generation cephalosporin was observed. No multidrug-resistant bacteria were found.
Conclusions:
- Findings suggest a lower PPM colonization rate than previously reported, potentially due to geographic factors.
- The study highlights the need for refined perioperative infection management strategies.
- Absence of multidrug-resistant bacteria is a key finding for surgical patient care.
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