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ArcA mutant of S. enterica serovar Enteritidis exhibited normal growth under both aerobic and anaerobic conditions. Wild-type strain SE2472 (WT), the SE2472 arcA mutant (arcA−), and vector pRB3-273C- and plasmid pRB3arcA-transformed arcA mutant SE2472 (arcA−[pRB3-273C] and arcA−[pRB3arcA], respectively) were grown in peptone-yeast extract medium either aerobically (A) or anaerobically (B). The concentrations of bacteria were determined by sampling and plating after incubation.
