2.3. Isolation and purification of fipronil degrading bacterial species
Bacterial cultures were isolated by surface plating of the enriched culture broth
(100 μl) on the solidified Dorn's medium supplemented with fipronil, in 90 mm Petri
dishes followed by incubation at 28 1C. After seven days, when individual colonies
appeared on the surface of the medium, individual colonies were picked up with a
sterile needle loop and streaked on the same medium. The growing individual colonies
from the streak plate were ultimately maintained by growth in slant tubes prepared
with the fipronil supplemented Dorn's medium as well as on LB agar medium and
maintained at 4 1C