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Results of an indirect ELISA with experimental sera from chickens orally infected with S. typhimurium (n = 8), S. enteritidis (n = 5), or S. enterica Pullorum and Gallinarum (n = 7) on H:i-specific fragment pcr6-i (A) or H:1,2-specific fragment pcr2-1,2 (B). OD, optical density.
