Re: [Alpacasite] Dr. Tibary and BVDV

OPPS! I just re-read my email and realized I reversed what I meant to say.
I should have said: false negatives are not an issue but false PCR
positives can be high.

Steve McCarthy
Spruce Ridge Farm
Old Chatham, NY
www.spruceridgefarm.com

In a message dated 11/26/2005 10:33:37 A.M. Eastern Standard Time,
sprucealpacas@aol.com writes:

Elden
That is interesting because I have been told from several vets that false
positives are not an issue on BVD PCR tests, but that false negatives can
be
high. I wonder if Dr Tibary was referring to the fact that PI crias
usually
will test negative on antibody tests (I think they only way they can test
positive on that test is if they get BVD antibodies from the mother's
milk).

I know that there is some controversy in the alpaca vet and virology worlds
about which tests (Serum Neutralization, ELISA) are actually effective for
camelids. I just had duplicate samples sent to two different labs to run 2
different tests so the results should be interesting.

Steve McCarthy
Spruce Ridge Farm
Old Chatham, NY
www.spruceridgefarm.com

In a message dated 11/25/2005 8:32:59 P.M. Eastern Standard Time,
tcalpacas@aol.com writes:

Copied from the most recent ARI BOD meeting minutes:

"Dr. Tibary then discussed the status of the Bovine Diarrhea Virus (BVDV)
problem. He said that current lab tests for the virus are difficult to
interpret,
especially considering the fact that there are many “persistently infected
animals” (“PIs”) who may not test positive for the virus and who are the
most
dangerous agents of the virus’s transmission. He urged us to support
research
in this area."

Has anyone talked with or otherwise heard more of Dr. Tibary's
understanding
of BVDV and alpacas? I'm especially interested in "...current lab tests
for
the virus are difficult to interpret.." as I was not aware of that.

Elden Harms
Token Creek Alpacas LLC
Sun Prairie WI

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Steve McCarthy
Spruce Ridge Farm
Old Chatham, NY
www.spruceridgefarm.com

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