Cultures liquefy gelatin and form yellowish white colonies on potatoes

It is prevalent in dust, earth, and water, and often contaminates culture material. B. merismopoedioides. See Bacterium merismopoedioides. B. mesenteric us fusc us. A species of b. found on potatoes, in the air, and other places, forming small, short, actively motile rods. B. mesenteric us rubiginosus. See Leptothrix epiderm i dis. B. mesenteric us vulgatus. The potato b., motile and reproducing by spores. It acts as a diastatic ferment, coagulates casein, liquefies gelatin, and resembles B. megaterium. B. Moelleri. An acid-fast b. found in gra , hay, and dung, which can be distinguished by its more rapid growth at 200 C. from the tubercle b. b. of Morax-Axenf eld. A b.