COMPARATIVE STUDIES OF THE GENUS MALLEOMYCES AND SELECTED PSEUDOMONAS SPECIES I

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Abstract
Comparative morphological, cultural, and biochemical study of 3 strains of Malleomyces mallei, 15 strains of Malleomyces pseudomallei, 20 strains of Pseudomonas aeruginosa and 8 other Pseudomonas species indicates that members of the genus Malleomyces can be readily distinguished from P. aeruginosa by their inhibited growth on Difco SS agar, desoxycholate agar, sodium azide agar, and CTAB agar. When incubated at a temperature of 21[degree]C, carbohydrate oxidation, proteolysis and nitrate reduction are of little value in differentiating M. pseudomallei from P. aeruginosa. It is not possible to induce phenazine pigment production in 18 Malleomyces strains by using methods which enhance fluorescin and pyocyanin production in 7 previously nonpigmented strains of Pseudomonas species. The cephalotrichous nature of M. pseudomallei as revealed by the electron microscope, indicates that this species could be included in the family Pseudomonadaceae.