Antimicrobial activity of the G. sylvestre leaves
extracts viz. aqueous, methanol, chloroform and Hexane
were determined, using the agar well diffusion assay
method[13]. Approximately 20 mL of molten and cooled
media was poured in sterilized petri dishes. The plates
were left overnight at room temperature to check for any
contamination to appear.
The test organisms were grown in broth for 24 h. A 100
mL broth culture of each test organism (1伊105 cfu/mL) was used to prepare lawns. Agar wells of 5 mm diameter were
prepared with the help of a sterilized stainless steel cork
borer. Five wells were prepared in the agar plates. The wells
were labeled as A, B, C, D and E. ‘A’ well was loaded with 10
毺L of aqueous leaves extracts, ‘B’ well was loaded with 10
毺L of methanol leaves extracts, ‘C’ well was loaded with 10
毺L of chloroform leaves extracts, ‘D’ well was loaded with
hexane leaves extracts and ‘E’ well was loaded with positive
control drugs.
Various bactericides/fungicides (Table 1) were used as
positive controls. The plates containing the organisms and
leaves extracts were incubated at 37 曟. The plates were
examined for evidence of zones of inhibition, which appear
as a clear area around the wells[14]. The diameter of such
zones of inhibition was measured using a meter ruler and the
mean value for each organism was recorded and expressed
in millimeter.