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

Table 2

Inhibitory effect of polyphenon-60 on the growth of NDV strains in chicken embryonated eggs.

NDV strain	Virulence	Concentration (μg/ml)	Time of survival (h)	Number of live embryos	Survival rates (%)
Miyadera/51	V	Untreated	48	0	0
		20	60	1	20
		50	72	1	20
Komarov/40	M	Untreated	60	0	0
		20	68	1	20
		50	84	1	20
Ishii/62	L	Untreated	96	0	0
		20	120	1	20
		50	120	5	100

L: lentogenic; M: mesogenic; V: velogenic.