Bacteria Strain Average halo produced on medium containing casein (mm)

RH-35 9.16

RH-37 14.6

RH-79 8.5

RH-39 11.66

RH-36 9.6

RH-19 12.66

RH-25 14.5

RH-96 5.3

Table 4: Tested strains three species of P. fluorescent bv. IV(RH-37) and P.
aeruginosa (RH-25) showed the largest clear zones, indicating high level of
protease production.