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Recovery of salmonellas from systemic sites, intestinal lymph nodes, and intestinal walls of calves after oral inoculation with S. typhimurium ST4/74. +ve indicates that salmonellas were recovered in numbers below the lower limit of accurate quantification (2.0 log10CFU g of tissue−1). ■, wild type; □, slyA mutant; HLN, hepatic lymph node; BLN, bronchial lymph node.
