Depends on the lab.... and you never know WHAT lab your vet is going to send it to.
Let me put it this way, a very valid study was done on the PCR test for FIV (which, granted is different from FELV), and they tested several cats, some who were positive, some were negative, and they threw in some DOG BLOOD, just as a control. The PCR found FELINE FIV in the DOG blood. To me, that's pretty much the definition of unreliable. http://www.vin.com/mainpub/feline/aafpfelvdx.htm states: 16. Other confirmatory tests, such as methodologies utilizing polymerase chain reaction (PCR), may be useful but are currently unvalidated. Although PCR offers a promising approach to FeLV testing, currently neither production of PCR reagents (primers) nor testing protocols is standardized or consistent. Phaewryn Please adopt a cat from Little Cheetah Cat Rescue!!! http://ucat.us/adopt.html Low cost Spay&Neuter services in VT, and Emergency Financial Assistance for cat owners: http://ucat.us/VermontLowCost.html Special Needs Cat Resources: http://ucat.us/domesticcatlinks.html The Sofa Poem: http://ucat.us/sofapoem.html Find us on PETFINDER! http://petfinder.com/shelters/VT44.html
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