Table 2.

Histopathological classifications and factor scores

Animal	Central nervous system pathologya	Factor 1	Factor 2	Factor 3
C1	Healthy seronegative control	0.818	1.533	0.930
C2	Healthy seronegative control	−0.108	1.588	1.380
C3	Healthy seronegative control	−0.420	1.386	0.045
C4	Healthy seronegative control	0.521	0.847	0.805
C5	Healthy seronegative control	−0.116	0.253	1.706
C6	Healthy seronegative control	0.723	−0.235	0.274
M1	Severe encephalitis	−0.574	−0.265	−0.079
M2	Severe encephalitis	0.434	−1.106	0.532
M3	Severe encephalitis	1.295	−1.131	0.728
M4	Severe encephalitis	0.572	−1.907	0.389
M5	Severe encephalitis	−0.364	0.553	−0.765
M6	Severe encephalitis	−0.005	−1.299	−1.882
M7	Atypical severe encephalitis	1.228	−1.370	0.044
M8	Moderate encephalitis	0.301	−1.792	0.487
M9	Moderate encephalitis	−0.422	0.484	0.989
M10	Moderate encephalitis	−0.732	−0.511	−0.319
M11	Moderate encephalitis	1.197	−0.842	0.351
M12	Mild encephalitis	−4.029	−0.848	0.307
M13	Mild encephalitis	−1.053	−0.166	0.784
M14	Mild encephalitis	−0.412	0.153	−2.453
M15	Mild encephalitis	0.415	1.661	−1.326
M16	Mild encephalitis	0.182	0.566	0.273
M17	Mild encephalitis	0.795	0.072	−0.668
M18	No encephalitis	0.362	0.381	−0.513
M19	No encephalitis	0.142	0.633	−0.259
M20	No encephalitis	−0.286	0.322	0.449
M21	No encephalitis	0.761	1.046	−1.709
M22	No encephalitis	−0.499	0.373	0.862
M23	No encephalitis	−0.724	−0.377	−1.363

^aNote: M1-M23 were all inoculated with either SIVmac251 or SIVmac239, and all were sacrificed because they were moribund with AIDS.