Figure 1

Cumulative percent of mortality induced in rainbow trout by a natural route of SDV infection. Juvenile rainbow trout (50 fish/tank, mean weight = 0.9 g and 3.3 g for SDV#1 and SDV#2, respectively) were infected by bath immersion with 5 × 10⁴ PFU/mL of SDV or mock-infected as a negative control. Mortalities were recorded each day over a period of 2 months and expressed as a percentage of cumulative mortality. Each infection was done in duplicate and in one of the aquariums, four fish were sampled at different time post-infection as indicated by the arrows (black for SDV#1 and grey for SDV#2).