Dear All,
A colleague has been carrying out tests for Enterobacteriaceae using VRB-G
(Violet Red Bile agar with Glucose, produced by Oxoid) agar. The test is
carried out as a pour plate using VRB-G, which is also overlaid with VRB-G.
Approx. 60 of the plates have grown creamy white colonies on the surface of
the overlay (not in the original test sample layer). I thought this might
have been environmental contamination, but all control plates used show no
growth.
The limited microscopy so far performed indicates that they are bacterial:
small rods (slightly longer than Listeria sp.) and are also motile.
Can anyone enlighten me? Can you suggest what they might be or what the
next stage of diagnosis might be?
Thank you for any help!
Tim
( Please reply to tmarsh at wrl.co.uk )
