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CYSTIC FIBROSIS |
1 Adult Cystic Fibrosis Centre, Wythenshawe Hospital, Manchester M23 9LT, UK
2 Medical Microbiology, Wythenshawe Hospital, Manchester M23 9LT, UK
3 Medical Microbiology, Medical School, University of Edinburgh, Edinburgh EH8 9AG, UK
Correspondence to:
Correspondence to:
Dr A M Jones, Adult Cystic Fibrosis Centre, Wythenshawe Hospital, Southmoor Road, Manchester M23 9LT, UK;
andmarkj{at}hotmail.com
ABSTRACT
Background: Chronic Pseudomonas aeruginosa infection is a major cause of morbidity and mortality for individuals with cystic fibrosis (CF). P aeruginosa cross infection outbreaks have recently been reported at CF holiday camps and specialist centres. The mechanism of cross infection is unknown. A study was performed to look for the presence of epidemic strains of P aeruginosa in the environment of a CF centre during a cross infection outbreak and to examine their potential modes of spread between patients.
Methods: Microbiological sampling of the environment of the CF facility was performed, including room air sampling. Individual P aeruginosa strains were identified by bacterial fingerprinting. The typing patterns were compared with those of epidemic strains responsible for cross infection among the patients.
Results: Epidemic P aeruginosa strains were isolated from room air when patients performed spirometric tests, nebulisation, and airway clearance, but were not present in other areas of the inanimate environment of the CF centre.
Conclusions: Aerosol dissemination may be the most important factor in patient-to-patient spread of epidemic strains of P aeruginosa during recent cross infection outbreaks at adult CF centres.
Keywords: cystic fibrosis; cross infection; Pseudomonas aeruginosa
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