%0 Journal Article %A Papavassiliou, J. %T Lysoǵeny and Colicinogeny in Escherichia coli %D 1961 %J Microbiology, %V 25 %N 3 %P 409-413 %@ 1465-2080 %R https://doi.org/10.1099/00221287-25-3-409 %I Microbiology Society, %X SUMMARY: One hundred and eighty-three strains of Escherichia coli were examined for lysogeny and colicinogeny: 40·4 % were neither lysogenic nor colicinogenic; 31·1 % were only colicinogenic; 13·1% were only lysogenic; 15·2% were lysogenic and colicinogenic. Though the detection of lysogeny could almost certainly be increased by using a greater number of sensitive indicator strains or by using more sensitive methods, the results of this study suggest: (a) that lysogeny in E. coli is more frequent than found in earlier studies (Fredericq, 1952); (b) that lysogeny and colicinogeny are not correlated but occur independently in E. coli strains. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-25-3-409