Synergistic Effect of Combined Antibiotic and Methanolic Extracts of Withania somnifera and Catharanthus roseus against MDR Salmonella enterica Serovar Typhi

Table 5

Synergistic assay of various fractions of methanolic extract of W. somnifera and C. roseus against S. Typhi isolates.

S. no.	Fractions	GIIs	Effects	FICs	Effects
1	Ethyl acetate	0.6	Synergistic	0.8	Additive
2	Chloroform	0.7	Synergistic	0.5	Synergistic
3	Butanol	0.5	Additive	1	Antagonistic
4	Aqueous	0.45	Antagonistic	2	Antagonistic

GIIs = growth inhibitory indices; FIC = fractional inhibitory concentrations.