Figure 3From: Infectious salmon anaemia virus (ISAV) mucosal infection in Atlantic salmon Number of fish positive for ISAV HE in gill cryo-sections by IFAT. Fish positive on days 1–5 pi displayed positive epithelial cells, while fish positive on days 6–12 pi displayed positive endothelial cells. A transition from epithelial infection (days 2–5 pi) into endothelial infection (days 6–12 pi) occurs between day 5 and 6.Back to article page