Figure 1

Immunohistochemical results demonstrating the presence and location of comma-shaped immunopositive cells (brown). Example of a skin ulceration of a challenged fish that died at 4 days post-inoculation. In the exposed dermal tissue and interstitial space of the underlying muscular tissue comma-shaped immunopositive cells are noted. The insert shows a higher magnification to point out the invasion of the immunopositive cells in the interstitial spaces of the muscle. Scale bar = 100 µm.