Table 2. Virulence of Vollum strains in rabbits and GP.

Strain		Vollum wt	Vollum Δpag Δlef Δcya	Vollum ΔpXO1	Vollum ΔpXO2	Vollum Δpag Δlef Δcya ΔatxA	Vollum ΔpXO1 ba2805:: atxA	VollumΔpag Δlef Δcya ΔpXO2	Vollum ΔpXO1 ΔpXO2
pXO1/pXO2		+/+	+/+	−/+	+/−	+/+	+/−	+/−	−/−
Rb	SC	V	V (HD)	NV	NV	NV	ND	ND	ND
	IV	V	V	NV	V (HD)	NV	V	ND	ND
	IC	V	V	V	V	V	ND	NV	NV
GP	SC	V	V	NV	V (HD)	NV	V	ND	ND
	IC	V	V	V	V	ND	ND	NV	NV

V- virulent, HD- high dose, NV- non virulent, ND – not done.