Re: [Felvtalk] Felvtalk Digest, Vol 24, Issue 3

[MaryChristine]

yeah, the old wisdom that positive-mom meant all-positive litter, and
negative mom meant all negative babies ain't worth the litter they poop
in

the latest stuff that i've read seems to imply that the role of nurturing,
cleaning, etc may be the biggest source of exposure--so, as i put it, if
great-aunt tabby is the nursemaid in the family/colony, and SHE is positive,
then mom could be negative and babies could test positive because of tabby.

i don't know of any proven cases where cats who have processed the virus out
of their systems ever re-testing positive from a later exposure: even tho
there are different strains of the virus, most sanctuaries have found out
that they've had "positives" living with their negatives, often for years,
because they didn't know to retest. i know in the sanctuary where i worked,
kitties in all stages of infection, from asymptomatic on downhill were
together, so the possibilities for re-exposure when the virus was active
were certainly there.

remember, tho, that they haven't done nearly enough basic research on this
virus to have gotten to the point of looking at re-infection

MC



-- 
Spay & Neuter Your Neighbors!
Maybe That'll Make The Difference

MaryChristine
Special-Needs Coordinator, Purebred Cat Breed Rescue (www.purebredcats.org)
Member, SCAT (Special-Cat Action Team)
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Re: [Felvtalk] Felvtalk Digest, Vol 24, Issue 3

[Carmen Conklin]

1. RE. Immunity.
Hi, Lorrie, I read with interest your post and wanted to weigh in on an
interesting circumstances that happened at our sanctuary some years ago
which made us determine that we had to test every cat and kitten in a
litter. We had a mother cat come in who was pregnant. She was NEGATIVE for
any virus (several tests) She had five kittens. Two of those kittens were
Positive FeLV and three were negative (from then on)
Since then we have had others tell us a similar story.  Something to do in
the breeding part I believe.  The post made me think of that mother cat and
her five kittens. Carmen


On 6/2/10, felvtalk-requ...@felineleukemia.org <
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>   1. Re: Immunity (jbero tds.net)
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> Message: 1
> Date: Tue, 1 Jun 2010 20:51:31 -0500
> From: "jbero tds.net" 
> To: felvtalk@felineleukemia.org
> Subject: Re: [Felvtalk] Immunity
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> Interesting question.  I guess that answer would be, it depends.  If he was
> exposed to the virus, and he probably was given the close contact litter
> mates have,  it is possible he has developed an immunity.  To the best of
> my
> knowledge, vets do not currently measure antibody titers to felv - not sure
> why.  I could look into it. (the presence of certain titer of antibody
> infers immunity).
>
> It is possible he was never exposed to the virus, but given the history
> seems unlikely.
>
> Finally, is it possible for a cat to be exposed, beat the virus and on
> repeat exposure develop disease.  Anything is possible, but unless he
> becomes immunosuppressed it's not likely.
>
> I guess, I would consider it highly likely he has developed an immunity
> given his history, negative viral status and current age.  Of course a
> false
> negative is always possible, but also unlikely given repeat testing.
>
> Is there a reason you are asking this?  If you plan on introducing another
> felv cat it may be worth while simply vaccinating him anyway.
>
> Hope that helps.
>
> Jenny
>
> On Tue, Jun 1, 2010 at 6:35 AM, Lorrie  wrote:
>
> > In 2008 I rescued a litter of kittens.  All of them were positive
> > except one. He tested negative, and retesting has shown he is still
> > negative. Since he is negative and his immune system beat the virus
> > his litter mates (all gone now) had does this mean he is now immune
> > to FelV?
> >
> > Lorrie
> >
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> End of Felvtalk Digest, Vol 24, Issue 3
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