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May 2011

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Subject:
From:
"Vestby, Jann (GE Healthcare)" <[log in to unmask]>
Reply To:
The Pharmaceutical Microbiology Forum Email List <[log in to unmask]>
Date:
Wed, 18 May 2011 14:15:54 +0200
Content-Type:
text/plain
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text/plain (112 lines)
Hi all

 

Example (simplified):

 

You have 100 plastic components.

 

You use 5 flask and test 20 components per flask.

 

You get these results:

 

1: 0 CFU

2: 0 CFU

3: 0 CFU

4: 0 CFU

5: 0 CFU

 

Should you report the overall results as:

 

(0+0+0+0+0) = 0 CFU

or if you say that 0 CFU = NMT 1 CFU

 

(NMT 1+ NMT 1+ NMT 1+ NTM 1+ NMT 1) = NMT 1 CFU

 

or 

 

(NMT 1+ NMT 1+ NMT 1+ NTM 1+ NMT 1) = NMT 5 CFU

 

or if NMT 1 CFU = 1 when used in calculations 

 

(1+1+1+1+1) = 5 CFU

 

???

 

I'm confused..

 

Best regards

Jann Vestby

M.Sc., Research Scientist


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