Abstract
This study shows the effectiveness of vaccination with an E2 subunit vaccine against classical swine fever (CSF) in 2-week-old piglets. Half of the piglets were carrying maternally derived antibodies (MDAs) at the time of vaccination. Three and 6 months later, antibody levels were compared between the two treatments. Moreover, reduction of virus transmission was investigated at 3 and 6 months by doing transmission experiments. The vaccine was found to be capable of reducing virus transmission significantly at both time intervals. Maternal immunity reduced vaccination-induced antibody levels after 3 and 6 months and possibly led to a less effective protection against virus transmission after 6 months.
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