Table 1.

Efficacy of specific IgY (s-IgY) and non-specific IgY (n-IgY) against A. hydrophila infections when used before challenge (Prevention) or after challenge (Treatment) as evaluated by protection rate and average bacterial numbers in the kidney in the fishes died of the infections

Groups		Days post-challenge				Protection (%)	Average bacterial No. in died fishes’ kidney (cfu/g)
		1	2	3	4~8
Prevention	PBS	8	2	0	0	0/10 (0)	2.9×106
	s-IgY	3	1	0	0	6/10 (60)	4.6×103
	n-IgY	9	1	0	0	0/10 (0)	3.1×106
Treatment	PBS	8	2	0	0	0/10 (0)	3.2×106
	s-IgY	5	1	1	0	3/10 (30)	5.6×104
	n-IgY	9	1	0	0	0/10 (0)	4.5×106