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J Clin Microbiol. 1984 February; 19(2): 122-125

Comparative studies and laboratory diagnosis of Vibrio vulnificus, an invasive Vibrio sp.

ABSTRACT

Vibrio vulnificus was isolated from a bacteremic patient. This strain, together with other isolates of V. vulnificus, was compared with V. alginolyticus, V. fluvialis, and V. parahaemolyticus with regard to growth characteristics on enteric agar media (enabling isolation and identification) and production of exoenzymes which could correlate with invasive potential. V. vulnificus grew well on MacConkey. Endo, xylose-lysine deoxycholate, and Hektoen enteric agar plates. Because V. vulnificus colonies resembled those of lactose-fermenting strains of the family Enterobacteriaceae, however, isolation of this vibrio from mixed specimens or stools may require the use of thiosulfate-citrate-bile salts-sucrose agar. V. vulnificus produced numerous exoenzymes (protease, DNase, lipase, and esterase) but not elastase or lecithinase. Although differences in exoenzyme production were observed among the four vibrio species, no single exoenzyme could be linked to the invasive potential of V. vulnificus.