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Salmonella enterica serovar Typhimurium (ATCC; 4 × 108 CFU/mL) in the rectal content of pigs (treatment effect P = 0.09) orally given the carrier only, cortisol, or norepinephrine at 0800 and 1600 h on day 0 and given an internasal Salmonella enterica serovar Typhimurium challenge. Data are mean CFU ± SE at 24 h after inoculation. a,bP ≤ 0.05.
