1. Light sensitive

When a quality control shows less growth on the DRBC plates than expected, it can happen that the DRBC plates have been in the light for too long. When DRBC is exposed to light this will result in the formulation of inhibitory compounds. Therefore keep the DRBC media in a dark and cool place until used.
In particular, CRM-SCE.00085MM will give inhibited growth when DRBC plates are exposed to light for too long.

2. Colony appearance of CRM-PAU on different DRBC suppliers

The mould colonies appearances of CRM-PAU on DRBC can vary from supplier to supplier. Sometimes sporulation hasn’t started yet.


3. Colony appearance on one DRBC batch of medium

It is also possible that different colony forms can be observed in one batch of DRBC, while the plates have been inoculated at the same time. The first DRBC plates (#009) of a batch show sporulation after 5 days, while later filled plates (#949) in the batch does not yet show sporulation.

#009                                                            #949

We will respond to your message by email as soon as possible.
Comments specificly relevant for this article and other visitors will be published in this section. Questions that also apply to other articles are published in the F.A.Q. section.

Comment on this article

Your email address will not be published.


Quality in Control

Microbiological laboratories should be able to receive reliable analysis without much overhead. A microbiological analyst must be able to focus on the primary activities, for example analysis of the sample material. Quality control should support the analyst in a logical and simple manner. By using modern information technology, process control and quality assurance are designed smarter and more effective.

Biosisto b.v.
Martin Luther Kingweg 3
9403 PA Assen, The Netherlands
www.biosisto.com

BiosistoStandard