Antibacterial activity was further characterized by determining whether
bacteriostatic or bactericidal. The test was performed by swabbing of
the growth inhibition zone. The swab was streaked onto nutrient agar
plate and incubated aerobically at 37°C for 24 hours. The presence of
growth in nutrient agar plate was interpreted as an inhibitory activity
i.e. bacteriostatic, while no growth was interpreted as bactericidal.