Characterization of a Mycobacterium fortuitum strain capable of degrading polychlorinated phenolic compounds
1993
Nohynek, L.J. | Haggblom, M.M. | Palleroni, N.J. | Kronqvist, K. | Nurmiaho-Lassila, E.L. | Salkinoja-Salonen, M.
We describe in this paper the taxonomic properties of a polychlorophenol degrading bacterium, strain CG-2, identified as Mycobacterium fortuitum. This bacterium is a Gram-positive, acid fast staining actinomycete, with a morphological life cycle from coccus to rod. It had the cell wall of chemotype IV characterized by meso-diaminopimelic acid, arabinose and galactose. It grew optimally at +28 degrees C to +37 degrees C, and tolerated 5% NaCl in rich medium. The main menaquinone was of type MK-9 (H2), with nine isoprenoid units and one hydrogenated double bond, mycolic acids were of high molecular weight (over 60 carbons), and the GC content of DNA was of 68%. These characteristics and the results of diagnostic biochemical tests as well as whole cell fatty acid composition support the identification of strain CG-2 as Mycobacterium fortuitum. The nutritional characterization of M. fortuitum strain CG-2 showed that it grew well on 18 different carbon sources out of 140 tested.
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