Table 1.

The hemolytic activity and virulence of R. anatipestifer strains

Strain number*	Strain name	Hemolytic activity on the duck blood agar	Hemolytic activity by liquid hemolysis assay (%)†	LD50 to ducklings
2	CH3	dba+	8.00±0.45	4.80×108 c.f.u.
3	NJ-1	dba+	9.03±0.26	≥ 1010 c.f.u.
33	HXb2	dba+	6.85±0.29	1.20×103 c.f.u.
16	SC-12	dba+	5.44±0.59	≥ 1010 c.f.u.
17	Yb2	dba-	4.95±0.23	3.81×105 c.f.u.
18	JY-1	dba-	4.43±0.14	6.12×108 c.f.u.

*Numbers corresponding to the numbers given to the strains in Table S1.

†After bacteria and duck red blood cells incubation in Williams’ Medium E for 24 h, the hemolytic activity of R. anatipestifer strains was detected by liquid hemolysis assay.