Kittens can sometimes have a false FIV + result.  The FIV portion of the combo 
test looks for FIV antibodies so if the kitten has antibodies from the mother 
still in it's system then the kitten can show positive for FIV.  But waiting a 
little and testing later the kitten will usually show negative because the 
Mom's antibodies will no longer be present.  Other than that I haven't heard of 
too many false positives for FIV.  I'm sure there are and I just haven't looked 
into it.  If those test kits aren't handled properly they can show false 
positives for FeLV so I would think they could for FIV too.

“I am not interested to know whether vivisection produces results that are 
profitable to the human race or doesn’t….the pain which it inflicts upon 
unconsenting animals is the basis of my enmity toward it, and it is to me 
sufficient justification of the enmity without looking further.” – Mark Twain

Date: Fri, 18 Nov 2011 12:34:30 -0800
Subject: Re: [Felvtalk] testing cats

I don't have enough authority/knowlegde to say I disagree with the last 
statement "cats over the age of 16 wks are virtually inmune to FeLV"..I'd say I 
wished, because I have seen cats older than 3 yrs to get infected.
Whether it was the cat was sick and wasn't obvious even to an ELISA(wich I had 
been told it can give false FIV results but is accurate on FeLV) I don't know.
Being on the rescue & adopt out position, I've to get my adoptables tested and 
vaccinated. It'd be wonderful if everybody would know the facts

--- On Fri, 11/18/11, dppl dppl <> wrote:

From: dppl dppl <>
Subject: [Felvtalk] testing cats
To: "" <>
Date: Friday, November 18, 2011, 6:27 PM

As I continue to try to learn as much as possible about this illness and 
testing the kitten I found,
I came across this post on the Best Friends site questioning the testing 
process.  I was wondering if
anyone had any comments on its contents?Thanks
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