FIG 6.

Binding of rabbit antibodies to P. aeruginosa O11 LPS by ELISA. (A) Ninety-six-well plates were coated with P. aeruginosa O11 LPS (2 μg/ml), and antibody samples were serially diluted 5-fold. Rabbit antiserum to O11-Epa was used as a positive control, and preimmune serum and Shigella O1-Epa IgG were used as negative-control sera. The data represent means (± standard errors) of two independent experiments. (B) Repeating units of polysaccharides from different bacterial genera. The shared structure of the repeating units is underlined.