Fig. 5
From: S1 domain of the porcine epidemic diarrhea virus spike protein as a vaccine antigen
PEDV S1-specific antibody responses in sows. a Sow serum IgG titers were measured at the indicated time points post-vaccination by ELISA using the recombinant purified S1 protein as an antigen. Sows were vaccinated three times on days 0, 14 and 28 as indicated by arrows. b Virus-neutralizing antibody titers in sera from sows collected at indicated time points post-vaccination. c Colostrum IgA titers and d colostrum IgG titers were determinded by ELISA. Colostrum samples were collected on the day of farrowing