Summary
The increase of lysogenization in phage infected cells has been investigated with increasing multiplicities of infection in the system Salmonella thyphimurium-phage P 22. The increase of infection resp. lysis and lysogenization with multiplicity follows first order reaction kinetics as concluded from multiplicities<0.3. Under the experimental conditions employed, the probability per phage is 0.57 for lysogenization and 0.43 for lysis. If multiplicity is>0.3 and cells are infected with more than one phage, the lysogenizations increase according to one hit kinetics, whereas the lysis of cells decreases. It is concluded, that lytic reactions in multicomplexes, which can be initiated independently by every one of the infecting phage particles will be suppressed by lysogenic reactions initiated by other independently infecting phages of the complex. Our experiments suggest, that immunity of the prelysogenic condition is the process responsible for the suppression of the lytic reaction. Therefore, in multicomplexes the immunity induced by one of the infecting phages is superimposed upon the one hit lytic infection causing the percentage of lysogenization increasing with multiplicity.
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Prell, H.H., Prell, H.H.M. Der Einfluß der Infektionsmultiplizität auf die Lysogenisierung im System Salmonella typhimurium — Phage P 22. Archiv. Mikrobiol. 34, 211–232 (1959). https://doi.org/10.1007/BF00412112
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DOI: https://doi.org/10.1007/BF00412112