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Subject:
From:
Carolyn Lim <[log in to unmask]>
Reply To:
The Pharmaceutical Microbiology Forum Email List <[log in to unmask]>
Date:
Tue, 24 May 2011 16:56:11 +0800
Content-Type:
text/plain
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Dear Adrian,

I don't think you count the number of organisms at all in a sterility test.
Based on USP <71>, you conduct the test in FTM and TSB. Both of which are
broth.

Do tell me if I'm wrong.

Thank you.
Carolyn.

On Fri, May 20, 2011 at 12:08 AM, ADRIAN AMODIA ALMEIDA <
[log in to unmask]> wrote:

> Hello Forum
> Could anyone help me with the interpretention of the folowing limits:
>
> When an acceptance criterion for microbiological quality is prescribed, it
> is
> interpreted as follows:
>
>  10^1 cfu: maximum acceptable count = 20;
>  10^2 cfu: maximum acceptable count = 200;
>  10^3 cfu: maximum acceptable count = 2000;
> and so forth.
>
> Is this applied to the final count for sterility test?
> how about the dilution, if I have  a 1/10 dilution and the limit is 100
> cfu/g then I can only have 10 colonies on my plate.
>
> thanks.
>
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The PMFList (http://microbiol.org/PMFList_info.htm) is operated from
The Microbiology Network (http://microbiol.org) and supported by
our sponsors (http://microbiol.org/sponsor.htm) as a service to
the scientific community.

Please take a second to visit our sponsors' web sites and say thank you for their support of this service.

Accugenix - http://www.accugenix.com

American Type Culture Collection - http://www.atcc.org

BD Diagnostic Systems - http://www.bd.com/ds/

Biolog - http://www.biolog.com

Biomerieux - http://industry.biomerieux-usa.com

Biotest - http://www.BiotestUSA.com/micro

MicroBioLogics, Inc. - http://www.microbiologics.com

MODA Technology Partners: now a LONZA company http://lonza.com/moda

Pall - http://www.pall.com

NovaTek International - http://www.ntint.com

Rapid Micro Biosystems - http://www.rapidmicrobio.com  (formerly GPS)

Veltek Associates, Inc - http://www.sterile.com

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The nature of this service is to provide a medium for communication.  The specific statements and endorsements of individuals participating in the discussions are not necessarily those of The Microbiology Network, Inc., the PMF, or the sponsors of the list.

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