That's the most easy to understand explanation I've heard yet :)

Maureen Olvey <molvey...@hotmail.com> wrote:

>
>Here's how my vet friend explained things to me which will clarify a little 
>about what Beth is saying about the IFA test.
>
>The IFA test looks to see if the virus is in the white blood cells.  It's not 
>a bone marrow test however, white blood cells are produced in the bone marrow, 
>so if the virus is in the white blood cells then it's because it's replicating 
>in the bone marrow.  If it's not replicating in the bone marrow the FeLV virus 
>could still be in the bone marrow but dormant.  You wouldn't know that without 
>a bone marrow test because it's just sitting there not doing anything and not 
>spreading or causing problems.
> 
> 
>So here's what the vet has told me about the all ways of testing:
> 
>The first screening test is the ELISA test.  The ELISA test can be performed 
>two ways.  It can be done using a snap test kit in the vet's office or the 
>blood sample can be sent to a lab where they do a "Well test."  The well test 
>is also an ELISA test that looks for small fragments of the virus in the 
>bloodstream but just done a different way and uses a much larger blood sample. 
> The ELISA test that is done with a snap test kit in the vet's office is also 
>called a combo test because it looks for FIV also.  Then there is the 3 way 
>snap test kit which looks for FIV, FeLV and heartworms.  I think the ELISA 
>test that is done in a well by sending the blood to a lab just looks for FeLV, 
>not the other two.  I'm not positive though.
> 
>So, the ELISA test looks to see if there are small fragments of the virus in 
>the blood stream.  Part of the virus could be in the bloodstream but not in 
>the white blood cells.  It gets into the oral cavities and bloodstream before 
>it goes into the bone marrow.  When it gets into the bone marrow it could 
>start replicating and then it gets into the white blood cells.  The IFA test 
>looks to see if the virus is in the white blood cells.  So from my 
>understanding, the virus has to progress from the bloodstream into the bone 
>marrow and replicate like Beth is saying to get into the white blood cells.  
>Usually once it's starts replicating in the bone marrow and getting into the 
>white blood cells the cat will not be able to fight off the virus.
> 
>FYI - my vet has also said that the 3 way snap test kits don't seem to be as 
>reliable as the combo snap test kit.
> 
>So that's a very simple and basic way of explaining the different ways of 
>testing and what they look at to determine what stage the virus is in as it 
>spreads throughout the body.  That's my understanding and I hope it's correct.
> 
>
>
>
>Date: Wed, 7 Dec 2011 08:12:39 -0800
>From: create_me_...@yahoo.com
>To: felvtalk@felineleukemia.org
>Subject: Re: [Felvtalk] Very Scary Testing results!
>
>
>
>The IFA tests weather the virus is replicating in the bone marrow. You can 
>have a positive SNAP & a negative IFA. This does NOT mean the cat is negative. 
>It just means the virus is not replicating in the bone marrow. 
>Any test can be done wrong & labs can mix up donors with specimins. It happens 
>with humans, it can certainly happen in our pets. 
>
>Don't Litter, Fix Your Critter! www.Furkids.org
>
> 
>
>
>
>
>
>From: GRAS <g...@optonline.net>
>To: felvtalk@felineleukemia.org 
>Sent: Wednesday, December 7, 2011 9:21 AM
>Subject: Re: [Felvtalk] Very Scary Testing results!
>
>The IFA is not testing the bone marrow, though....that would be yet another
>test.
>
>-----Original Message-----
>From: felvtalk-boun...@felineleukemia.org
>[mailto:felvtalk-boun...@felineleukemia.org] On Behalf Of Beth
>Sent: Tuesday, December 06, 2011 9:57 PM
>To: felvtalk@felineleukemia.org
>Subject: Re: [Felvtalk] Very Scary Testing results!
>
>It is possible the SNAP tests were positive & an IFA was negative because
>the virus had not progressed to the bone marrow. I also wonder if the SNAP
>tests that were positive were done on the new 3way tests. Our shelter
>stopped using them because they were not dependable.
>
>Kat Parker <korruptaki...@gmail.com> wrote:
>
>>*Very scary.. see below..*
>>
>>------Original Message------
>>From: Ellen Fawl
>>To: rescuealliancew...@yahoogroups.com
>>Subject: Scary FELV test results!
>>Sent: Nov 22, 2011 11:16 PM
>>
>>I need to share this so it can get to the FELV Lists and whomever is 
>>following this testing debacle. We took in 5 Persians last week. We had 
>>them combo tested with the standard Snap test. All five tested 
>>positive.  We had blood work done on one cat and it came back negative.
>>We assumed the tests were done wrong so they redid them two days ago.
>>All four remaining cats tested positive AGAIN.
>>We had blood work taken on all four, sent it in, and all four came back 
>>negative.
>>
>>This is really scary stuff. Cats are killed all the time because they 
>>test positive. Had we heard about these cats being in a shelter & 
>>testing positive it's not likely we could have taken them in. The vet 
>>office in Santa Cruz is going to follow up with the company, but if 
>>there is anyone else out there tracking this stuff, I want to get the 
>>information to them.
>>Ellen
>>
>>
>>*
>>
>>Love and Katnip,
>>                  ~Kat~    =^,,^=
>>
>>
>>
>>**"I'm Kat Parker.  I park cats."**
>>**"Keep your kitties INSIDE, 24/7, 'cause an inside cat is a SAFE & 
>>HAPPY
>>cat!"*
>>
>>_______________________________________________
>>Felvtalk mailing list
>>Felvtalk@felineleukemia.org
>>http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org
>_______________________________________________
>Felvtalk mailing list
>Felvtalk@felineleukemia.org
>http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org
>
>
>_______________________________________________
>Felvtalk mailing list
>Felvtalk@felineleukemia.org
>http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org
>
>
>
>_______________________________________________ Felvtalk mailing list 
>Felvtalk@felineleukemia.org 
>http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org         
>                                
>_______________________________________________
>Felvtalk mailing list
>Felvtalk@felineleukemia.org
>http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org
_______________________________________________
Felvtalk mailing list
Felvtalk@felineleukemia.org
http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org

Reply via email to