Accuracy of FeLV/FIV Tests?
My sister and I have a disagreement maybe someone can shed light on this.
We have a three year old cat (Candy) that was around others cats, one of which that tested positive for feline leukemia virus. So we isolated Candy for TWO months and got her tested for FeLV/FIV. The vet drew blood and sent it to a lab and it came back negative. We are planning on giving her away to a new owner who already has a cat, so we have some concern about the possibility of a false negative. Someone told my sister that for best results, you must wait THREE months before you test to allow the virus to activate because FeLV can be dormant for awhile. So my sister wants to warn this lady that even though the test came back negative, that because we didn't wait for three months, the results may not be as valid as they could be. I'd like to get some quantification on this. Is there any research indicating that waiting three months would significantly reduce false negatives than waiting two months? What is the probability of her having FeLV if the test comes back negative after a one month isolation from other cats? After a two month isolation? After a three month isolation? Sorry I don't know the exact kind of test, but just assume it's a standard FeLV/FIV blood test. Thanks, Louis |
Accuracy of FeLV/FIV Tests?
Your sister is absolutely right, there is a latency period. The standard in-
house test has been associated with false positives. Where a positive is found, it should always be backed-up by a Gold Standard lab test by a veterinary hospital. http://www.fabcats.org/felv_000.html Louis wrote: My sister and I have a disagreement maybe someone can shed light on this. We have a three year old cat (Candy) that was around others cats, one of which that tested positive for feline leukemia virus. So we isolated Candy for TWO months and got her tested for FeLV/FIV. The vet drew blood and sent it to a lab and it came back negative. We are planning on giving her away to a new owner who already has a cat, so we have some concern about the possibility of a false negative. Someone told my sister that for best results, you must wait THREE months before you test to allow the virus to activate because FeLV can be dormant for awhile. So my sister wants to warn this lady that even though the test came back negative, that because we didn't wait for three months, the results may not be as valid as they could be. I'd like to get some quantification on this. Is there any research indicating that waiting three months would significantly reduce false negatives than waiting two months? What is the probability of her having FeLV if the test comes back negative after a one month isolation from other cats? After a two month isolation? After a three month isolation? Sorry I don't know the exact kind of test, but just assume it's a standard FeLV/FIV blood test. Thanks, Louis -- Message posted via CatKB.com http://www.catkb.com/Uwe/Forums.aspx...ealth/200702/1 |
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