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Petri films - record the results in MPN/gram or CFU/gram?

petri films mpn

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#1 jiljilbean

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Posted 29 May 2019 - 04:33 PM

hey guys,

 

Just curious...when using the 3M petri film method, do I need to record the results in MPN/gram or CFU/gram?

 

Thanks :):)



#2 majoy

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Posted 29 May 2019 - 05:25 PM

When I used to do lab, petrifilm results are always reported in cfu/g sample.


"Whatever you do, do it well..." - Walt Disney


#3 jiljilbean

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Posted 29 May 2019 - 05:58 PM

Thought so.

 

thank you majoy :)



#4 Ryan M.

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Posted 29 May 2019 - 11:15 PM

3M has some high quality information on the use and interpretation of the petrifilm plates.  I use them in all our micro plating SOP's with petrifilm plating.  There is one for each specific type of petrifilm.

 

https://www.3m.com/3...294857497&rt=r3



#5 Charles.C

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Posted 30 May 2019 - 01:37 AM

hey guys,

 

Just curious...when using the 3M petri film method, do I need to record the results in MPN/gram or CFU/gram?

 

Thanks :):)

 

It directly relates to the specific Procedure.

 

And the Procedure directly relates to the specific Objective.

 

MPN Procedures are often invoked where the level of target species is Low, typically <100 cfu/gram. Originally developed for micro (indicator) evaluation of water supplies.


Kind Regards,

 

Charles.C





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