Abstract
Staphylococcus culture 105B was serially treated with 0.05% hydrogen peroxide at 54.4 C or without hydrogen peroxide at this temperature to determine changes in resistance to these conditions and in catalase activity of the surviving populations. Resistance of the final surviving populations to H2O2 treatment and to heat treatment without H2O2 was 5.6 and 4.5 times greater, respectively, than the parent culture. Catalase activities of the cell-free extracts of survivors of the H2O2 treatments and of the heat treatments were 33.56 and 2.69 times greater, respectively, than the control. The untreated control cultures grew in Peptonized Milk (Difco), but addition of sodium pyruvate to the medium was necessary to support growth of survivors.
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Selected References
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