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Lestradamus
LSU Fan
Baton Rouge
Member since Dec 2015
318 posts

Anyone know the cycle threshold for the Covid PCR test in Louisiana?
PCR cycle threshold is basically how long your Covid sample culture is allowed to grow before they can say it’s detected by their machines or not. This is a clever way to fudge Covid numbers.

I was wondering if LDH set any standard for the number of PCR cycles or ,at a minimum, reporting them. I can’t find anything on the web.


oVo
New Orleans Saints Fan
Member since Dec 2013
10038 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
*smack smack*


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Jim Rockford
LSU Fan
Member since May 2011
81424 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
bout tree fiddy


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10
OysterPoBoy
USA Fan
City of St. George
Member since Jul 2013
22969 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
I want to say 7.


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KamaCausey_LSU
Member since Apr 2013
8313 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?

quote:

PCR cycle threshold is basically how long your Covid sample culture is allowed to grow before they can say it’s detected by their machines or not. This is a clever way to fudge Covid numbers.


I believe it is up to the lab running the analysis. You'll have to check with each individual lab to see what their Ct threshold is.

Also they are likely changing the positive requirements? A positive with a high Ct (weak) will require a second test based on WHO recommendations. LINK. Hopefully they implement this sooner rather than later.


Lickitty Split
LSU Fan
Inside
Member since Apr 2017
2717 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
You’re about 8 months late to this party


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Rendevoustavern
LSU Fan
First floor Ourso
Member since May 2018
797 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
We don't report cycle threshold. That is determined by the lab, instrument running the test/kit, and the kit itself.

We don't provide that to LDH.

Just ask the laboratory what kit they are using. Best be EUA approved.


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10
Lestradamus
LSU Fan
Baton Rouge
Member since Dec 2015
318 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
quote:

I believe it is up to the lab running the analysis. You'll have to check with each individual lab to see what their Ct threshold is.

Also they are likely changing the positive requirements? A positive with a high Ct (weak) will require a second test based on WHO recommendations. LINK. Hopefully they implement this sooner rather than later.


Does the state not require that the labs report these numbers to them? I feel like that’s really important.

The changes to the WHO recs are what had me thinking about this. It’ll be good for reducing false positives and opening up sooner, but my question is “why now”? It might be pretty obvious.


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TenLittleIndians
LSU Fan
Member since Feb 2020
53 posts

re: Anyone know the cycle threshold for the Covid PCR test in Louisiana?
Each assay that is used has it's own CT positivity range determined by the manufacturer. If its an assay that has EUA, you can view the CT range in their FDA IFU.


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