Background: Poly chlorinated biphen

Background: Poly chlorinated biphenyls (PCBs) are organic chemicals with toxigenic,
carcinogenic affecting human health and the environment using as dielectric fluids in transformers
as a cooling and insulating medium containing.
Materials and Methods: Soil samples were collected from transformer oil contaminated soil at
different workshops in three different districts of Khyber Pakhtunkhwa i.e. Peshawar, Nowshera
and Kohat and were kept at 4°C before analysis.
The samples were subjected to Pure culture isolation through a selective medium (Medium A).
After incubation for 24 to 48 hours at 37°C with 1% transformer oil as sole source of carbon, the
isolates were examined for their colony size, shape, margin, consistency, opacity, elevation and