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| Content Provider | PubMed Central |
|---|---|
| Author | Farmer, J. J. Herman, Lloyd G. |
| Abstract | A new method has been devised to trace cross-infection by Pseudomonas aeruginosa. Unknown strains growing logarithmically in liquid media were treated with mitomycin C to induce the liberation of pyocin and phage. The lysates were then tested against 27 selected indicator strains, and the zones of clearing were differentiated as to killing by pyocin or lysis by phage. Twenty-four standard pyocin-phage lysates were then applied to each of the unknowns, and the sensitivity pattern was recorded. Thus, an “epidemiological fingerprint” consisting of 51 operational characteristics was established for each isolate. Organisms from the same source had identical or similar fingerprints, but organisms from different origins could easily be distinguished. Pyocin production, pyocin sensitivity, and phage production were found to be stable genetic characters; however, spontaneous mutations in phage sensitivity were frequently encountered. The epidemiological fingerprint has proven to be a sensitive tool in establishing the identity or dissimilarity of unknown strains. This method has been of great value in tracing the epidemiology of P. aeruginosa in the hospital environment. Each of the 157 P. aeruginosa strains tested has been typable by this method. |
| Starting Page | 760 |
| File Format | |
| ISSN | 00036919 |
| Journal | Applied Microbiology |
| Issue Number | 5 |
| Volume Number | 18 |
| Language | English |
| Publisher Date | 1969-11-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine |
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