Antigenic characterization of ORO and IQT9924 (IQT) viruses.

The PRNT assay was done using convalescent sera from febrile patients infected with ORO or IQT9924 (IQT) virus. The PRNT titers are presented as the reciprocal of the highest serum dilution capable of neutralizing 80% of approximately 100 plaque-forming units (PFU) of virus.本研究采用感染ORO或IQT9924（IQT）病毒的发热患者恢复期血清开展空斑减少中和试验（Plaque Reduction Neutralization Test，PRNT）。该试验的效价以能够中和约100个空斑形成单位（plaque-forming units，PFU）病毒的80%的最高血清稀释度的倒数形式呈现。