Table 2. Effect of vaccination on salmon lice infestation following adult stage of lice.

Experimental groups	Number of Fish (n)	Reduction of adult lice number	Reduction of adult females	Reduction of gravid females with eggs	Reduction of egg string length (mm)	Reduction in F1 copepodids
Group 2	30	21%	40% *	42.5% *	5%	23%
			(P < 0.02)	(P < 0.04)
Group 3	30	3%	8%	22%	6%*	4%
					(P < 0.04)

*Shows significant difference with respect to control group. Group 2 is ip vaccinated group; Group 3 is ip vaccinated + bath immunization group. The percentage values were derived compared to control (group 1) from the data shown in Figs 2 and 3.