Figure 4.

Detection of viral RNA with RT‐qPCR. The number of viral RNA copies from the faecal samples of the piglets born to sows (a) #68, (b) #72, (c) #100, (d) #56, (e) #2,736, (f) #5 and (g) #2,750. (h) Detected viral RNA copies from the intestinal tissues of 4 piglets born to immunized sows. A high number of viral RNA copies detected in the intestinal tissues of piglets born to unimmunized sows (i) #5 and (j) #2,750