Microbiologic contamination study of nebulizers after aerosol therapy in patients with cystic fibrosis
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Published on: May 8, 2017
Insights
Nebulizers used by cystic fibrosis patients with Pseudomonas aeruginosa infections are often contaminated. Regular cleaning is crucial to prevent the spread of pathogenic bacteria and maintain treatment efficacy.
Area of Science:
- Medical Microbiology
- Pulmonology
- Infectious Diseases
Background:
- Cystic fibrosis (CF) patients with chronic Pseudomonas aeruginosa infections often use aerosol therapy.
- Delivery systems, such as nebulizers, may become contaminated after use.
Purpose of the Study:
- To assess the level of contamination in nebulizer devices after aerosol therapy in CF patients with P. aeruginosa infections.
Main Methods:
- Fifty-three CF patients (age ≥7 years) with P. aeruginosa infection, treated with recombinant deoxyribonuclease, and able to produce sputum were enrolled.
- Nebulizer devices were collected and analyzed for bacterial contamination.
Main Results:
- Out of 53 patients, 44 nebulizers were analyzed after excluding 9 devices.
- 37 nebulizers showed P. aeruginosa colonization (≥10^6 CFU/mL), and 7 showed counts between 10^5 and 10^6 CFU/mL.
Conclusions:
- Nebulizers used by P. aeruginosa-infected CF patients are frequently contaminated with pathogenic flora.
- This highlights the importance of proper cleaning protocols for nebulizer devices to prevent secondary infections.
Background:
To evaluate the contamination of delivery systems after an aerosol therapy session in patients with cystic fibrosis who have chronic Pseudomonas aeruginosa infection.
Methods:
Fifty-three patients with cystic fibrosis were enrolled in the study from March 1996 to June 1997. All patients were age 7 years or older and had P aeruginosa infection. They also had been treated with recombinant deoxyribonuclease and were capable of producing sputum for culture.
Results:
Nine devices were excluded for the study. A total of 44 nebulizers were included: 37 from patients with P aeruginosa colonization with a count of 10(6) colony-forming units/mL or more and 7 with a count of between 10(5) colony-forming units/mL and 10(6) colony-forming units/mL.
Conclusion:
This study demonstrates that in the absence of cleaning, nebulizers of patients with cystic fibrosis who are infected with P aeruginosa are likely to be contaminated by a pathogenic flora.
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