in adult healthy cats, the stats are that 70% can be adequately exposed until to test positive, and either never do so, or process the virus out of their system. they also know that some percentage of that 30% who do remain viremic, never become symptomatic, and are not contagious, even tho they continue to test positive.
vets consistently forget, and we must consistently remind them, that the SNAP (and IFA, actually) test not for antibodies/infection, but for antigens/exposure--so a confirmatory test is literally vital. sadly, there is just not enough research to say what the percentages are in kittens--back in 2002, it was presumed that ALL kittens of positive moms (many of whom probably weren't positive to start with) were be definition positive themselves, and all were killed. when mom wasn't there to test, if one kitten in a litter tested positive, or the litter's blood was mixed (heaven forfend!) and was positive (again, remember, to ANTIGENS only), all were most likely killed. asymptomatic positive adults were most likely to be given a chance, while kittens were far less lucky. hence no research pool. in sanctuary settings, anecdotally it seemed that asymptomatic kittens--especially of asymptomatic moms--who made it past six or seven months of age (when mom's antibodies wore off? don't know, but kept happening), and again past about 18-22 months (absolutely NO ideas on why that's an important mark) would survive--these were UNretested cats, remember. kittens of sickly moms, or kittens who were themselves sickly -- not necessarily REALLY sick, but just not as thrifty as others their age/developmental stage--tended to do less well. with retesting recognized as a necessity, with an IFA done at an interval long enough to let the virus work itself out of kitty's system, the majority of kittens tested negative. still do. just no real data to 'prove' it. paolo, have you seen this? *http://tinyurl.com/AAFP-Retrovirus-Guidelines* * * 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) _______________________________________________ Felvtalk mailing list Felvtalk@felineleukemia.org http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org