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Inhibition of virus plaque formation by anti-CSFV E2 IgA (A) and anti-CSFV E2 IgG (B) collected from pigs orally immunized with L. plantarum/pYG-E2-Tα1 and L. plantarum/pYG-E2, respectively. The antibodies were collected on days 0, 7, 21, 35, 42, and 56 after the first immunization. The inhibition value was expressed as the maximum reduction in the number of plaques. Results are the means ± standard errors of the means.
