The stainless steel coupons were removed from the Teflon holder
and washed five times with sterile deionized water. Thereafter three
of the 6 coupons were transferred to BacTrac™ vials containing 10 ml
of TSB and enumerated by using the impedance method described
above.While the other threewere tested by the bead-beating technique
followed by agar plating which is chosen as the standard recovery
method.