Table 2.

The infectivity of SFV, ultrafiltered SFV (UF SFV) and ultracentrifuged SFV (UC SFV); JEV, ultrafiltered JEV (UF JEV) and ultracentrifuged JEV (UC JEV); IAV, ultrafiltered IAV (UF IAV) and ultracentrifuged JEV (UC IAV) (n = 3).

Viruses	PFUs/ml	GCPs/ml	Particles/ml	PFU:GCP ratio	PFU:particle ratio
SFV	(2.11 ± 0.4) × 1011	(2.84 ± 0.5) × 1011	(4.2 ± 0.4) × 1011	1: 1.3	1: 2
UF SFV	(2.34 ± 0.6) × 1011	(3.12 ± 0.4) × 1011	(4.5 ± 0.2) × 1011	1: 1.3	1: 1.9
UC SFV	(3.05 ± 0.7) × 109	(5.21 ± 0.3) × 1011	(9.6 ± 0.2) × 1011	1: 170	1: 315
JEV	(1.47 ± 0.2) × 107	(1.45 ± 0.3) × 109	(4.2 ± 0.4) × 109	1: 99	1: 285
UF JEV	(2.76 ± 0.3) × 107	(4.67 ± 0.6) × 109	(9.1 ± 0.7) × 109	1: 169	1: 329
UC JEV	(3.16 ± 0.5) × 105	(8.51 ± 1.2) × 109	(1.1 ± 0.2) × 1010	1: 26930	1: 34810
IAV	(3.31 ± 0.5) × 106	(1.34 ± 0.2) × 1010	(2.7 ± 0.1) × 1010	1: 3900	1: 8100
UF IAV	(6.7 ± 0.5) × 106	(3.24 ± 0.2) × 1010	(5.6 ± 0.5) × 1010	1: 4700	1: 8300
UC IAV	(7.21 ± 0.5) × 106	(2.31 ± 0.2) × 1011	(6.8 ± 0.4) × 1012	1: 32000	1: 9.4 × 105