29 replies to this topic

[kconf]

Mind you this is exclusively for carcass. All the other regular Petri films are read as they appear, no further calculations. 

[GMO]

Ah ok, but still, explain for me, is it per cm2 of the carcass area swabbed or per cm2 of the petrifilm?

Why does it make a difference using petrifilm?

[kconf]

Area swabbed.

 

What do you mean why it makes a difference? Why does it get multiplied by 0.03? It has to do with dilution factor and carcass rinse. 

[GMO]

Area swabbed.

 

What do you mean why it makes a difference? Why does it get multiplied by 0.03? It has to do with dilution factor and carcass rinse. 

 

So it's from a rinse not a swab? But it says swab? Still not getting it. But I've been off topic enough!

[paulam1]

chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.fsis.usd...Swine_Estab.pdf

 

The best-sourced document is above for reference; The UCL/LCL should be based on historical trended data results, with your limits set accordingly.