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  • Title: Transfer of E1 and V colicinogenic factors to Shigella flexneri.
    Author: Csiszár K.
    Journal: Acta Microbiol Acad Sci Hung; 1975; 22(2):153-6. PubMed ID: 1092133.
    Abstract:
    From Escherichia coli strains, ColE1-ML and ColV-K94 factors were transferred to a virulent Shigella flexneri 2a strain at 1-2% frequency. S. flexneri ColV+ and ColE1+V+ produced Col- segregants. The ColE1 factor was stably incorporated into S. flexneri. The ColV+ culture lost its virulence to the guinea pig eye.
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