Abstract
Cell-envelope architectures of three strains of leprosy-derived corynebacteria (LDC) named Kim, FPSA, and 43LL were compared withMycobacterium leprae andM. avium as well as with related organisms (Nocardia asteroides andCorynebacterium psuedotuberculosis). Cytochemical studies were performed at the ultrastructural level after the lead citrate, silver proteinate, acidic phosphotungstic, and ruthenium red colorations. This study showed that, while the organisms belonging to theCorynebacterium-Mycobacterium-Nocardia (CMN) group had only the cytoplasmic membrane but not the cell wall reacting with the silver proteinate coloration, the LDC organisms had both the cell wall and the cytoplasmic membrane reacting with this coloration method. Moreover, the three strains of the LDC organisms differed from one another at the level of their exopolymer content.Mycobacterium leprae, on the other hand, gave a cytochemical response common to other mycobacteria and the members of the CMN group studied. Consequently, the envelopes of the LDC organisms were not identical toM. leprae, neither morphologically nor cytochemically.
Published Version
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