Colony appearance of B. pseudomallei. Colony morphology was observed after spread plating cells on blood agar and incubation for 4 days at 37°C in air. (A, B, and C, top row) Colonies on blood agar; (D, E, and F, bottom row) colonies on TSA. Nonmucoid colonies (A and D), mucoid colonies (B and E), and mixed colonies (C and F) are shown.