Figure 9From: Interactions of highly and low virulent Flavobacterium columnare isolates with gill tissue in carp and rainbow trout Gill tissue of a trout following exposure to HV-isolate at SP 1. Localized necrosis (long arrows) is observed in a gill lamella (L) while the neighbouring lamella remains intact (short arrow), apart from slight oedema (white arrows) of the epithelium on the sides where bacteria are present (TEM, bar = 10 μm).Back to article page