Table-2.

Total CFU of E. coli in different dilutions of WSR extract

20% Aqueous WSR extract dilutions	CFU/100 µl after 24 h	Percent inhibition w.r.t. control positive
Group A (Undiluted)	9.40b±3.05×106	38.68
Group B (1:2)	10.33bc±5.21×106	32.62
Group C (1:4)	12.27cd±4.06×106	19.96
Group D (1:8)	6.53a±2.91×106	57.40
Group E (1:16)	8.4ab±2.31×106	45.21
Group F (1:32)	13.60de±2.31×106	11.29
Group G (control positive)	15.33e±8.11×106	0
Group H (control negative)	-	-

Mean±SE with unlike superscript in the column differ significantly (p<0.05), SE=Standard error, E. coli=Escherichia coli, WSR=Withania somnifera root, CFU=Colony forming units