FIG. 4.

Opsonophagocytic killing of various Staphylococcal strains indicated in each panel by rabbit sera raised to PNAG-DT conjugate vaccine (open symbols) or dPNAG-DT conjugate vaccines (solid symbols). Points represent mean of quadruplicate determinations, two for each of the two rabbits immunized with each vaccine, and error bars indicate standard deviations. Opsonic killing of >30% is considered biologically significant and is statistically significant at P < 0.01; analysis of variance (ANOVA) and Fisher probable least squares difference (PLSD) posthoc, pairwise analysis.