I have had some contadictory advice on a set of mikrocount dipslide results.
The evaluation tables for mikrocount total plate count bacteria are shown below:
For the two samples using mikrocount dipslides out results came back as ND (no colonies detected). These are samples from two different water sources used in our cosmetics manufacturing. The dipslideswere cultured @ 30 C for 48 hours.
Samples of the same water sent to a commercial laboratory came back with the following results for Heterotrophic Plate Count
@35°C for 48 hours :
Sample # 1: 1.4 x 10 (to the power 5) cfu/mL (sorry, cannot display the 5 superscript here).
Sample # 2: 2: 5.0 x 10 (to the power 4) cfu/mL
Any opinions on these sets of results?
Thanks.
Comments
The result is very related to the sample amount to the agar, that’s why for water testing the minimum determination is higher that high viscosity products such as solid/creams, which can be sampled more to the agar surface.
Cofounder & Chief Formulator
Indochine Natural
Can the lab perform any identity testing
We had so often growth on unused plates that were still in unopened package (and still had a good expiry date!) the decision followed to use double sterilized plates (those that are also sterilized in its secundary package) instead. More pricey, but problem solved! And to imagine that the primary packages of the plates were only opened in class B cleanrooms...
(Ok, these are a different brand and are plates instead of dipslides, but the medium and use are the same)
Cofounder & Chief Formulator
Indochine Natural
Cofounder & Chief Formulator
Indochine Natural
The brand is Tritium (select English flag right above for site translation) and the type I was referring to in particular were rodac plates with TSA.