Page 33 - ITPS-5-2

27 INNOSC Theranostics and Pharmacological Sciences, 2022, Vol. 5, No. 2 Madhavamurthy et al.

Negative control - - - - - - - - - - - - - - -

Standard (25 μg) 17.20±0.25 15.12±0.25 17.23±0.63 14.63±0.54 17.25±0.56 15.56±0.85 11.12±0.64 12.54±0.32 10.44±0.87 13.12±0.25 19.56±0.74 13.26±0.26 17.64±0.54 15.54±0.54 18.36±0.58

75 μL - 8.24±0.26 - - - - - - - - 8.12±0.39 - - 13.34±0.29 -

S. flexneri

50 μL - 8.58±0.98 - - - - - - - - - - - 12.21±1.32 -

75 μL - 11.64±0.54 - - - - - - - - - - - 13.24±0.65 -
B. subtilis
Zone of inhibition measured in mm 50 μL 75 μL - - 9.22±1.24 10.24±0.87 - - - - - - - - - - - - - - - - - - - - - - 12.32±0.62 14.32±0.57 - - Note: Values are means of three independent replicates±SE. Notes: “-“: absence; Aq: Aqueous; Chl: Chloroform; Meth: Methanol; negative control: Respective solvents; standard: Streptomycin; E. coli: Escherichia coli; P. aeruginosa: Pseudomonas aeruginosa; S. typhi: Salmonella typhi; B.

Table 2. Antibacterial activity of selected orchids in various solvent extracts

S. typhi

50 μL - 9.64±0.98 - - - - - - - - - - - 11.32±0.24 -

P. aeruginosa 75 μL 50 μL - - 8.64±0.54 - - - - - - - - - - - - - - - - - - - - - - - 15.36±0.52 14.25±0.46 - -

75 μL - 9.54±0.54 - - - - - - - - 8.54±0.24 - - 18.64±0.24 -

E. coli

50μL - 8.12±0.25 - - - - - - - - 8.54±0.87 - - 11.14±0.64 -

Plant and extract D. jerdonianum Chl Meth Aq D. barbatulum Chl Meth Aq E. mysorensis Chl Meth Aq B. neilgherrense Chl Meth Aq P. pallida Chl Meth Aq

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