Abstract
Randomly amplified polymorphic DNA (RAPD) analysis was performed on 95 pigeon S. gallolyticus strains of different virulence and belonging to different biotypes and different culture supernatant phenotypes as determined by SDS-PAGE. Four distinct RAPD patterns, designated A, B, C and D, were distinguished using primer OPM6 (5′CTGGGCAACT). All 76 strains generating RAPD pattern A or B were designated highly virulent on the basis of their SDS-PAGE pattern. Five of seven strains generating RAPD pattern C and 11 of 12 strains generating RAPD pattern D belonged to the moderately virulent and low virulent culture supernatant phenotype groups, respectively. Only one RAPD group C strain belonged to a highly virulent culture supernatant phenotype group. There was a correlation between biotype and RAPD patterns. These findings indicate that there is a high correlation between RAPD pattern and virulence for pigeons. Therefore, RAPD typing seems a rapid, reliable method to distinguish pigeon S. gallolyticus strains of high, moderate and low virulence.
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