Abstract
Among the facultative bacteria capable of growth on mesquite wood which were isolated from the asceptically dissected hind-gut of the termite R. hesperus were 2 strains of Bacillus cereus, 1 strain each of Arthrobacter, Alcaligenes and Serratia, and a very small gram-negative fermentative rod. The B. cereus strains, the S. marcescens strain and the Arthrobacter sp. grew well on a mineral salts .alpha.-cellulose agar. One of the B. cereus strains and S. marcescens hydrolyzed gels of carboxymethylcellulose. All isolates grew well with mesquite wood as the C source. The S. marcescens isolate produced prodigiosin but differed from a typed strain both in size and in some physiological characteristics.

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