Porcine epidemic diarrhea virus (PEDV) is a member of the family Coronaviridae. PEDV causes acute enteritis in swine of all ages, and it is often fatal for neonatal piglets. To protect piglets from PEDV, Sow transfers immunoglobulin through colostrum to their children until the piglets acquire adaptive immunity. Many reports suggest that IgA is important for protection of PEDV. AniGen IgA ELISA measures preventive anti PED-virus IgA titers of sow and predict defense capability of piglets induced by passive antibody transfer.