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Determination of O-antigen serotype of 19 B. bronchiseptica strains by using convalescent-phase sera. B. bronchiseptica strain RB50-induced and strain 1289-induced sera were used to determine if serum raised against one strain recognized antigens the same size as O antigen in whole-cell lysates from the indicated strains. The numbers next to each Western blot indicate molecular weights (in thousands).
