Fig. 5From: Development of an indirect ELISA to detect PEDV specific IgA antibody based on a PEDV epidemic strainDetermination of IgA levels of clinical samples by the i-ELISA. Serum (N = 40) and oral fluid (N = 40) samples were tested by the i-ELISA to evaluate changes of IgA levels in a sow herd with the whole-herd feedback treatment for 7 days and 14 days. ***p < 0.001Back to article page