FIG 1.
Reductions in viral infectivity titers (log10 TCID50 per milliliter) for SaV (A, B, and C), FCV (D, E, and F), MNV (G, H, and I), and TV (J, K, and L) incubated at RT for 7, 14, 21, and 28 days. Viruses were left suspended in their virus-infected cell lysates or were semipurified by ultracentrifugation and ultrafiltration followed by resuspension in sterile water. Significant differences between time points within each virus are indicated by at least one different alphabet letter. Significant differences between semipurified viruses with respect to unpurified viruses are indicated by *, while those between the two purification methods are indicated by #.