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  Indian J Med Microbiol
 

Figure 5: Serum bactericidal antibody assay using the postchallenge sera after heat inactivation with bacterial inoculum of 1.5 × 104 colony-forming unit/ml. Bacterial growth was inhibited with immunized sera at 1:10 dilution and 25% and 50% guinea pig complement. Sera at other dilutions and 12.5% guinea pig complement did not inhibit the bacterial growth

Figure 5: Serum bactericidal antibody assay using the postchallenge sera after heat inactivation with bacterial inoculum of 1.5 × 10<sup>4</sup> colony-forming unit/ml. Bacterial growth was inhibited with immunized sera at 1:10 dilution and 25% and 50% guinea pig complement. Sera at other dilutions and 12.5% guinea pig complement did not inhibit the bacterial growth