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Piliation and colonial morphology among laboratory strains of meningococci.

By I W DeVoe and J E Gilchrist


Colonial morphology and piliation were studied on twelve strains from various serogroups of Neisseria meningitidis. Six different colony types (M1 to M6) were identified. Most strains elaborated only an M1 colonial type, which is similar to gonococcus T4. Several combinations of piliation and colonial morphology were observed: (i) colonial variation in which neither parent nor variant were piliated; (ii) colonial variation involving piliated and nonpiliated cells; (iii) dissociation of piliated from nonpiliated cells with no colonial change; and (iv) colonial variation in which both variants were piliated but with distinctly different pili. Results of this study demonstrate that correlations between piliation and colony morphology within N. meningitidis are exceptions rather than the rule

Topics: Research Article
Year: 1978
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Provided by: PubMed Central
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