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  • Title: Lysis from without of S. aureus K1 by the combined action of phage and virolysin.
    Author: RALSTON DJ, BAER BS, LIEBERMAN M, KRUEGER AP.
    Journal: J Gen Physiol; 1957 Nov 20; 41(2):343-58. PubMed ID: 13475696.
    Abstract:
    LYSIS FROM WITHOUT (LFW) OCCURS IN TWO STEPS: (1) sensitization of cells by phage, which renders the cells susceptible to (2) destruction of an essential cell structure by an extracellular lytic enzyme. Virolysin, from phage-infected cells, was used in these studies. Normal cell autolysin is also effective. Evidence is presented that: 1. Neither phage nor lysin alone causes LFW. 2. Sensitization requires phage adsorption. 3. It can be caused by non-infectious particles. This establishes a new biological activity of the particle. 4. Heat, U.V., detergents, penicillin, and other damaging agents also sensitize cells. 5. Sensitization involves a non-lethal, reversible reaction. 6. Sensitization by phage prevents virus synthesis. Following adsorption, a cell can undergo sensitization or infection but not simultaneously. When only a few particles are adsorbed, infection can occur; when sufficient particles are adsorbed, sensitization takes place. 7. Quantitative aspects of LFW are described. Lysis proceeds logarithmically. The lysis end-point depends upon the phage concentration but is independent of the enzyme concentration.
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