Cindy,

You said:
I took in a cat back in November (Smokey) before I
brought him into the household I took him to the vet
and had him checked and tested for felv.  The test
showed negative.  I brought him home and let him be
around some of my other cats.  All of my other cats
had been vaccinated every year.

You might reconsider the annual FELV vaccines if you read up on all the risks
involved, and the facts on adult immunity against FELV.
http://www.vin.com/VINDBPub/SearchPB/Proceedings/PR05000/PR00109.htm
http://www.vin.com/proceedings/Proceedings.plx?CID=WSAVA2004&PID=8708&O=Generic
http://www.vin.com/proceedings/Proceedings.plx?CID=WSAVA2002&PID=2615
http://www.vmth.ucdavis.edu/vmth/clientinfo/info/genmed/vaccinproto.html
http://www.fenixresearch.com/vet/vasavmar.shtml
http://www.vas-awareness.org/References.htm
http://www.avma.org/vafstf/default.asp
http://www.dvmnewsmagazine.com/dvm/data/articlestandard/dvm/482003/77544/article.pdf
http://www.vetinfo.com/cvaccprob.html
http://www.vetinfo.com/cfeleuk.html
http://www.avma.org/onlnews/javma/sep04/040915k.asp
http://www.tahealth.net/vas.html
http://www.feline-vas-support.org/
http://www.avma.org/vafstf/treatcoutomacy.asp

And just what, exactly is IN a vaccine anyways? Pretty scary if you do a little
research! (yeah, not JUST your PET vaccines, this stuff is in the vaccines your
pediatrician shoots into your CHILDREN):
http://www.whale.to/vaccine/adjuvants.html
http://www.vaccination.inoz.com/ingredie.html

And this is a post Nina posted a while back, from a vet:

Hello Everyone,
I've been discussing resistance ratios of healthy adult cats to Felv
with the vet that monitors my IBD list.  She just sent this to me this
morning and knew you guys would be interested.
Nina

Lisa...this is a question that comes up quite frequently.
The natural resistance to FeLV infection in cats older than 4 to 6 months
is very well established among feline retrovirologist.  While
susceptibility to FIV remains constant throughout life, that simply is not
the case with FeLV.  While it is NOT impossible to infect an adult cat,
the inoculate of FeLV has to be really significant (or repeated) in order
to infect.

This has been shown in virtually all FeLV vaccine Challenge studies
involving adult cats.  It is MOST difficult to assess efficacy of an FeLV
vaccine when using adults as controls...because they just don't get
infected.  Schering Plough has turned this into a "3-year guarantee" for
their FeLV vaccine (a VERY reactive adjuvanted vaccine).  This is a
'no-brainer'...obviously!  Fact is, ALL FeLV vaccines look good in the
long run because of this natural resistance.

This phenomenon is apparently related to T-cell maturity in the individual
cat and the interaction of those lymphocytes with specific epitopes of
FeLV.

The updated Feline Vaccination Guidelines are being written now.  This
material will be included to more clearly point out this phenomenon.

I do have a copy of the original paper...it goes back a number of years
now and was published in a virology journal...Richard Olsen (who developed
the first FeLV vaccine for Norden Laboratories) and Jennifer Royjko (sp?)
published the manuscript.  I don't have that paper with me...but will try
to dig this out and send the ref if you're really interested in getting
into that.
RBFord

Here's more to back that up:
http://www.caberfeidh.com/FelineTiters.htm
http://www.netcat.org/symposium/vaccinology.html
http://www.cathealth.com/FeLV.htm
(just do a google search on FELV natural adult immunity, or FELV titers, or 
adult
resistance FELV, you'll get hundreds of sites that say FELV resistance is high 
in
adult cats naturally)

Jenn
http://ucat.us
http://ucat.us/domesticcatlinks.html
Adopt a cat from Little Cheetah (UCAT) Cat Rescue:
http://ucat.us/adopt.html
PLEASE DONATE TO THE TANGLE FUND:
Tangle is a cat in Greece that was severely injured when someone wrapped wire 
around
his neck to strangle him,
Little Cheetah Cat Rescue is raising funds to bring Tangle to Vermont to find 
him a
good home!
http://ucat.us/tangle-fund.html
DONATE: We could really use a power saw (for construction), a digital camera 
(for
pictures), and more towels!



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