Remove the sample vial to a container with dry ice or a freezer block. Keep vial on ice or block. (Do not let vial content thaw)
Open vial aseptically to avoid contamination
Using a sterile loop, remove a small amount of frozen isolate from the top of the vial
Aseptically transfer the loop to GC agar
Use streak plate method to isolate single colonies
Incubate inverted plate at 36°C
± 1°C
in 5% CO₂ for 20-24 hrs.