Antibacterial Assay: The bacterial strains were collected from International Centre for Diarrheal
Diseases Research, Bangladesh (ICDDR, B). The bacteria were grown in nutrient agar plates at
37° C and pure colonies were maintained in nutrient agar slants at 4°C. Susceptibility tests were
performed by a modified agar-well diffusion method (Perez, et al., 1990) using nutrient agar as
the culture media. A 100 µl volume of the standard suspension of test bacterial strain was spread
evenly on a previously bored (using a 7 mm cork borer) plate using a sterile glass rod spreader.
The plates were allowed to dry at room temperature. Subsequently 150, 100 and 50 µl of
Paederia foetida extract (500 mg/ml) were introduced into the wells. After holding the plates at
2-8º C for 2 hours to allow diffusion of the extract into the agar, the plates were incubated at
37º C for 24 hours. The diameter of zone of inhibition was measured to the nearest millimeter