Comparative usefulness of ribotyping, exotoxin A genotyping, and SalI restriction fragment length polymorphism analysis for Pseudomonas aeruginosa lineage assessment
| Autor: | Daniel O. Sordelli, Mariana Catalano, Marcelo Nociari, Steven C. Copenhaver, Daniela Centrón García, Michael L. Vasil |
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| Rok vydání: | 1996 |
| Předmět: |
Microbiology (medical)
Genotype Exotoxins Microbial Sensitivity Tests Biology DNA Ribosomal law.invention Ribotyping law Pseudomonas exotoxin Typing Deoxyribonucleases Type II Site-Specific Genotyping Polymerase chain reaction Phylogeny Genetics Electrophoresis Agar Gel Molecular epidemiology General Medicine Molecular biology Bacterial Typing Techniques Blotting Southern Infectious Diseases Pseudomonas aeruginosa Restriction fragment length polymorphism Polymorphism Restriction Fragment Length |
| Zdroj: | Diagnostic microbiology and infectious disease. 24(4) |
| ISSN: | 0732-8893 |
| Popis: | Ribotyping, exotoxin A genotyping (EAGP), and restriction fragment length polymorphism (RFLP) analysis of total DNA with SalI (SalI RFLP) were compared for intraspecies discrimination of 93 Pseudomonas aeruginosa isolates. Type-ability of all methods was 100% and the results of typing with each method remained unchanged during laboratory manipulation. Clonal groups defined with each molecular method were largely coincident and, in those cases where inconsistencies were detected, isolates were analyzed by transverse alternating field gel electrophoresis (TAFE) and arbitrarily primed polymerase chain reaction (AP-PCR). SalI RFLP analysis was highly discriminative so as to distinguish unrelated isolates of close lineage. However, it was not a good method to identify isolates of unrelated lineage because SalI RFLP appeared to be subjected to convergent evolution. The index of discrimination suggested by Hunter and Gaston was determined to assess the discriminatory power of the molecular methods utilized either alone or in several combinations. Combined use of ribotyping and SalI RFLP analysis reached the highest index of discrimination (0.982) and proved to be a very valuable tool for epidemiological differentiation of P. aeruginosa isolates. |
| Databáze: | OpenAIRE |
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