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Comparison of the lytic efficiencies of phages. Cultures were incubated at 37°C without aeration (A) or with aeration (B). E. coli O157:H7 (3 × 104 CFU) was treated with KH1 (■ and □), KH4 ( and ), or KH5 (⧫ and ◊). The MOI was 103 PFU/CFU. The control contained only E. coli O157:H7 (● and ○). The standard errors of the E. coli O157:H7 concentrations ranged from 0.03 to 0.5 log10 CFU/ml (n = 4).
