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Appl. Environ. Microbiol., May 1997, 1674-1678, Vol 63, No. 5
L Hoi, A Dalsgaard, JL Larsen, JM Warner and JD Oliver
A total of 85 isolates of Vibrio vulnificus were characterized by
ribotyping with a probe complementary to 16S and 23S rRNA of Escherichia
coli and by randomly amplified polymorphic DNA-PCR (RAPD- PCR) with a
10-mer oligonucleotide primer. The RAPD-PCR results were scanned, and the
images were analyzed with a computer program. Ribotype membranes were
evaluated visually. Both the ribotyping and the RAPD-PCR results showed
that the collection of strains was genetically very heterogeneous.
Ribotyping enabled us to differentiate U.S. and Danish strains and V.
vulnificus biotypes 1 and 2, while the RAPD-PCR technique was not able to
correlate isolates with sources or to differentiate the two biotypes,
suggesting that ribotyping is useful for typing V. vulnificus strains
whereas RAPD-PCR profiles may subdivide ribotypes. Two Danish clinical
biotype 2 strains isolated from fishermen who contracted the infection
cleaning eels belonged to the same ribotype as three eel strains (biotype
2), providing further evidence that V. vulnificus biotype 2 is an
opportunistic pathogen for humans. One isolate (biotype 2) from Danish
coastal waters also showed the same ribotype as the eel strains. This is,
to our knowledge, the first time the isolation of V. vulnificus biotype 2
from coastal waters has been described.
Copyright © 1997, American Society for Microbiology
Comparison of ribotyping and randomly amplified polymorphic DNA PCR for characterization of Vibrio vulnificus
Department of Veterinary Microbiology, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark.
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