Table 2. Range of the initial frequency of the susceptible SL haplotype (p ₀) corresponding to long-term persistence of scrapie for different values of the scrapie transmission parameter β ₁ and the non-scrapie mortality rate coefficient ε ₃.

ε 3 (a)	range of p0
	β 1 = 2.00	β 1 = 2.80(b)	β 1 = 4.93(b)	β 1 = 10.00
0.01	0.845–0.845	0.712–0.712	0.535–0.536	0.376–0.377
0.02	0.844–0.845	0.710–0.714	0.533–0.539	0.375–0.379
0.05	0.843–0.846	0.709–0.716	0.532–0.540	0.373–0.381
0.08	0.842–0.847	0.708–0.717	0.531–0.542	0.372–0.383
0.10	0.842–0.848	0.707–0.719	0.530–0.544	0.371–0.384

^(a)No long-term persistence was observed for ε ₃<0.01.

^(b)The values β ₁ = 2.80 and β ₁ = 4.93 were the lower and upper bound estimates of Gubbins and Roden [6].

For a full description of the parameters and of other parameter values used see table 1.