Fig. 2

Density of Parvicapsula pseudobranchicola in the pseudobranchs of Atlantic salmon collected during the study period of 604 days, estimated as normalized expression (NE) of small subunit rRNA or ‘load’ (n cycles = 45-Ct). The first sample (-3) was taken prior to sea-transfer, when all fish were uninfected. Error bars for NE represent bootstrapped 95% confidence intervals, for ‘load’ they represent standard deviations. Asterisks (*): very low mean NE values; columns present but invisible (mean NE < 0.01)