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Deletion of exsE does not affect in vivo lethality. Indicated strains were used to infect C57-B6 mice as described by Piñeyro et al. (2010). Mice were observed over the course of 24 h and mortality was recorded. Kaplan–Meier survival plots for all strains are shown here; asterisks represent values with a statistically significant difference in mortality compared with wild-type NY-4 by log-rank analysis.
