PMC6447745_01
(A) Gram stain (x1000) showing gram negative curved bacilli, (B) TCBS agar, a highly selective medium for Vibrio species, showing large yellow colonies indicating fermentation of sucrose.
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PMC6447745_01_gr1.jpg
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Two different sets of blood cultures drawn in the emergency department grew gram-negative, oxidase-positive bacilli in all four bottles (Fig. 1A). When cultured on the thiosulfate-citrate-bile salts-sucrose (TCBS) agar, the organism formed large yellow colonies (Fig. 1B).