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. 2009 Nov 12;364(1533):3157–3168. doi: 10.1098/rstb.2009.0055

Figure 4.

Figure 4.

Invasion of cheats and Trojan horses into an established resident infection and consequent virulence (model 4). Black lines, wild-type (W). Blue lines, cheats or Trojan horses (C or T). Dotted lines, virulence (a weighted sum of wild-type and cheat density). (a,c,e) No within-host spatial structure (r = 0). (b,d,f) Limited within-host spatial structure (r = 0.3). (a,b) Cheats versus wild-type (model 4 with a = q = 0); virulence is a weighted combination of the two lineage densities, here virulence equals 2W + C. (c,d) Trojan horse cheats versus wild-type (model 4 with a = 0.5, q = 0.01), virulence equals 2W + T. (e,f) Trojan horse cooperators versus wild-type (model 4 with a = −0.3, q = 0.01), virulence equals 2W+T. Other parameters: x = 0.1, b = 0.2. Initial densities: W(0) = 1.1, C(0) = 0.001, T(0) = 0.001.