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Correlation of SBA titer with anti-LPS serum IgG titer. SBA and anti-LPS serum titers produced by mice immunized with S. Typhimurium CVD 1931 (A), S. Enteritidis CVD 1944 (B), S. Typhi CVD 910 (C), and S. Paratyphi A CVD 1902 (D). The data were analyzed using Spearman's correlation coefficient.
