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Numbers of mice surviving challenge with 100 (A) or 1,000 (B) LD50s of B. anthracis STI spores over 14 days after oral (open circles) or i.v. (open squares) inoculation with S. enterica serovar Typhimurium expressing chromosomally encoded PA83ec-′hlyA. The survival of control mice inoculated with S. enterica serovar Typhimurium Zoosaloral H alone is also shown (closed triangles).
