Figure 5.
Virulence of C. neoformans in animal models. (a) Survival of A/Jcr mice infected with C. neoformans WT, GAL7:IPC1, Δapp1, IPC1Rec, and Δapp1Rec strains; average mouse survivals were 14.9 ± 3.31, 25.4 ± 5.52, 21.7 ± 2.11, 18.8 ± 3.2, and 17.1 ± 2.5 days, respectively. The GAL7:IPC1- and Δapp1-infected mice lived significantly longer than WT mice (P = 0.002 and 0.01, respectively). (b) Survival of Tgε26 mice. Mice infected with the GAL7:IPC1 strain 10 lived significantly longer than WT-infected mice (20.14 ± 2.95 and 16.21 ± 1.76 days on average, respectively; P = 0.01), and mice infected with the Δapp1 strain showed a significantly decreased survival as compared with WT-infected mice (13.5 ± 0.51 versus 16.21 ± 1.76 days, respectively; P = 0.03). Mice infected with IPC1Rec and Δapp1Rec showed average survivals of 17 ± 2.2 and 15.85 ± 1.79 days, respectively, which were not significantly different from the average survival observed in WT-infected mice (P > 0.05).