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Survival rate of rainbow trout infected by immersion with the IHNV isolates RtWanju09, RtWanju15 and DF04/99. Fish were immersed in 105 TCID50/mL (A) or 103 TCID50/mL (B). Mortality was recorded daily until 43 days post-infection and is presented as the survival rate. Different letters indicate statistically significant differences in average of survival rate over the experimental period (p<0.05). Survival comparisons were performed using Cox proportional hazards model.
