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Stability of the infectivity of phage ISP, lyophilized at 9 log pfu/mL in two different stabilizers (sucrose and trehalose) at four different concentrations (0.3, 0.5, 0.8 and 1.0 M), after resuspension in saline and storage at 4 °C for 126 days. The results are the mean values of three titrations. Standard deviations are indicated.
