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Applied and Environmental Microbiology, February 2000, p. 855-859, Vol. 66, No. 2
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

A Selective Medium and a Specific Probe for Detection of Vibrio vulnificus

Marta Cerdà-Cuéllar,* Joan Jofre, and Anicet R. Blanch

Departament de Microbiologia, Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain

Received 8 August 1999/Accepted 6 December 1999

A selective medium (VVM) and a specific 16S rRNA gene (rDNA) probe (V3VV) for the detection of Vibrio vulnificus were developed. The medium contains D-(+)-cellobiose as the main carbon source and electrolytes (MgCl2-6H2O and KCl), which stimulate bacterial growth. Polymyxin B, colistin, and moderate alkalinity and salinity provide selectivity properties. V. vulnificus grows on VVM as flat, bright yellow colonies. Other Vibrio species tested either did not grow or showed green-bluish colonies, with the exception of V. campbelli, V. carchariae, and V. navarrensis. There is a higher colony count on VVM agar than on cellobiose-colistin agar or on modified cellobiose-polymyxin B-colistin agar. The specific probe was evaluated by colony hybridization and dot blot hybridization with PCR-amplified 16S rDNA using collection strains and environmental isolates. No strain studied other than V. vulnificus showed positive hybridization with this oligonucleotide. The combined use of VVM agar and the V3VV probe provided the recovery of V. vulnificus from mixed bacterial suspensions and spiked mussels.

* Corresponding author. Mailing address: Departament de Microbiologia, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain. Phone: 34 93 402 14 89. Fax: 34 93 411 05 92. E-mail: cerda{at}porthos.bio.ub.es.

Applied and Environmental Microbiology, February 2000, p. 855-859, Vol. 66, No. 2
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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