In Vitro Antiviral Activity of Green Tea Polyphenon-60 against Avian Paramyxoviruses

Figure 4

Inhibitory effect of polyphenon-60 on the hemagglutination of NDV strains. 4 HAU NDV strains with three different pathotypes were incubated with polyphenon-60 at different concentrations (10 μg/ml, 20 μg/ml, and 50 μg/ml). The well with untreated virus served as the negative control (N), and the well with only PBS served as the positive control (P). Three independent experiments were performed.