Fig. 2:

Mean growth inhibitions (diameters of inhibition zones) in mm produced by 1 mg/ml extract (MIC) of Psidium guajava on the 3 most sensitive of the 10 common diarrhoea-causing bacteria. The MIC for the other 7 organisms was 10 mg/ml (equivalent to 2.5 μg/ml of the active compound) of Psidium guajava extract