Table 3.

Antiviral activity of quercetin 7-rhamnoside against related viruses.

		TGEV		PRCV
Test drugs	CC50a	IC50b	TIc	IC50b	TIc
Ribavirin	>100	55.09 ± 0.8	>1.82	61.6 ± 1.91	>1.62
Quercetin 7-rhamnoside	>100	63.31 ± 1.07	>1.58	59.76 ± 5.70	>1.67

Results are presented as the mean IC₅₀ values obtained from three independent experiments carried out in triplicate ± S.D.

^aConcentration required to inhibit virus-induced CPE by 50% (μg/mL).

^bConcentration required to reduce cell growth by 50% (μg/mL).

^cTherapeutic index = CC₅₀ / IC₅₀.