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. 2011 Nov;18(11):1865–1871. doi: 10.1128/CVI.05318-11

Fig. 2.

Fig. 2.

(A) Mean group PCV2 ELISA S/P ratios (± SE) on serum collected from piglets vaccinated at day of age 5 (d5) or 21 (d21) or nonvaccinated and challenged with PCV2, PPV, and PRRSV at day 49, which corresponds to 44 days after vaccination for day 5 piglets and 28 days after vaccination for day 21 piglets. An S/P ratio of 0.2 or greater was considered seropositive. Significant differences among groups on a certain day are indicated by different letters (A, B, and C). (B) Comparison of subunit-d5 and chimeric-d5 pigs at different days postvaccination. Significant differences among groups on a certain day are indicated by an asterisk. (C) Comparison of subunit-d21 and chimeric-d21 pigs at different days postvaccination. Significant differences among groups on a certain day are indicated by an asterisk.