TABLE 2.
Particle type | Particle/PFU ratioa | HA titerb |
---|---|---|
dsRNA+ virions | 108 | 1.25 × 108 |
dsRNA− virions | 18,182 | 2.5 × 108 |
dsRNA+ ISVPs | 23 | 1.25 × 108 |
dsRNA− ISVPs | 6,250 | 2.5 × 108 |
Particle/PFU ratios were determined by dividing the number of viral particles per milliliter by the number of PFU per milliliter.
HA titer is defined as the minimum number of viral particles required to agglutinate bovine erythrocytes.