title: Putative virulence factors identified in Vibrio vulnificus strains isolated from oysters and seawater in Mexico.
abstract: The presence of Vibrio vulnificus was analyzed in oyster and estuarine water samples from Mexico by PCR amplification of the vvhA gene and some putative virulence factors were tested. Samples were collected from 12 different sampling points over a one-year period; 31% samples were positive for V. vulnificus and all isolates were identified as biotype 1. All strains were cytotoxic and proteolytic, 98% showed adherence to epithelial cells, 91.4% were DNase-positive, 77.6% were mucinase-positive, 97.8% were lecithinase-positive and 79.8% were lipase positive. Regarding colony morphology, 51% strains were opaque, 20% were translucid, 28% were both opaque and translucid, and 80.8% showed a capsule. This is the first report on the isolation of V. vulnificus strains from environmental samples in Mexico, which may pose a health risk for local fisherman and seafood consumers.
authors.affiliation: Escuela Nacional de Ciencias Biológicas, Mexico.
authors.forename: Elsa I
authors.initials: EI
authors.lastname: Quiñones-Ramírez
authors.forename: Ivan Natividad
authors.initials: IN
authors.lastname: Bonifacio
authors.forename: Miguel
authors.initials: M
authors.lastname: Betancourt-Rule
authors.forename: Florina
authors.initials: F
authors.lastname: Ramirez-Vives
authors.forename: Carlos
authors.initials: C
authors.lastname: Vázquez-Salinas
mesh_terms: D000818:Animals; D015169:Colony Count, Microbial; D005516:Food Microbiology; D006801:Humans; D008800:Mexico / Q000453:epidemiology; D016273:Occupational Exposure; D010125:Ostreidae / Q000382:microbiology*; D016133:Polymerase Chain Reaction; D012623:Seawater; D014735:Vibrio Infections / Q000453:epidemiology*; D041261:Vibrio vulnificus / Q000201:enzymology / Q000254:growth & development / Q000302:isolation & purification* / Q000472:pathogenicity; D037521:Virulence Factors / Q000235:genetics* / Q000378:metabolism; D014871:Water Microbiology
chemical_list: D037521:Virulence Factors