Figure 2

Mean survival (%) of rainbow trout ( Oncorhynchus mykiss ) after exposure to Flavobacterium columnare. The tested isolates were ancestral Rhizoid (used in inoculation in starvation experiment) and Rhizoid and Rough colony morphotypes isolated after starvation in lake water for 149 days (5 months). Control fish were exposed to sterile culture medium. P < 0.001 for all pairwise comparisons (Table 1).