Abstract
The genus Mycobacterium, despite its medical importance, has so far received relatively little attention from bacterial geneticists. Nevertheless examples of the transfer of genes from one strain to another by means of transformation, phage-mediated transduction and direct cellular contact have been reported. The modification of strains by experimental or naturally occurring lysogeny has been studied in some detail and there is evidence that phage may contribute significantly to variation within species. Mycobacteriophages have been the subject of genetic analyses and have proved of value in the study of certain aspects of host-induced phage modification. In addition phages are being used to develop typing systems for use in epidemiological studies. It is evident that much of interest and value awaits discovery by means of genetic analysis of the mycobacteria and their phages and hopefully the next decade or so will bring great advances in this subject.
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