Figure 1: TBlue agar plates (CTAB agar plates) showing dark blue haloes indicating the production of anionic surfactants. Ten micro liters of the inoculum were added into each well, plates were incubated for 48 h at 37°C and then stored in the refrigerator for 24 h. Dark blue haloes were then detected using normal light condition (A) and UV transilluminator (B).