Table 1. Summary of virus exposure trials.

	Atlantic salmon			Virus
Challenge Trial	Smolt age	Size (g)	No. per tank	Route	Dose	Duration of experiment (dpc)
Mininum infectious dose	71	123	40	imm.	101 –104	51
Virus shedding
Exp #1- Population	276	420	88	imm.	4.6×103	51
Exp #2- Individual	215	299	1	i.p.	5.0×104	14
Exp #3- Individual	253	350	1	imm.	4.6×103	35

Virus exposure through intraperitoneal injection (i.p.) or waterbath immersion (imm.) with dose reported as plaque forming units (pfu fish⁻¹) and (pfu ml⁻¹), respectively. Smolt age represents days after transfer to saltwater and size represents average fish weight at time of challenge. dpc: days post challenge.