On February 1, 2002, OptiGen Laboratory, LLC, a canine genetic
testing laboratory began accepting and processing blood tests to
determine - with 99% accuracy - if your Toller is clear, a carrier
of, or affected with Progressive Retinal Atrophy (PRA).
This exciting new test, available world wide, is made available
through the research of Dr. Gus Aguirre and colleagues of the James
A. Baker Institute for Animal Health at Cornell University.
"The test is as close to perfect as a test can be without
actually being a true gene test," said Dr. Aguirre, Alfred
H. Caspary Professor of Ophthalmology. Technically referred to as
the Toller prcd (progressive rod cone degeneration) test, the new
procedure is a gene marker test that can predict with 99 percent
accuracy a Pattern A (clear), Pattern B (carrier) or Pattern C (affected)
Unlike prcd tests offered for other breeds, this marker test is
specific for Tollers and results in a greatly reduced chance (0.05
percent or less) of false positive results. The test eliminates
the guess work from a breeding program with respect to prcd - the
only form of PRA seen in Tollers which results in blindness. Breeders
will no longer have to remove affected and carrier stock from their
breeding programs. As long as these dogs are bred to clear dogs,
they will not produce any affected dogs.
To read more about the discovery of the test and an extensive Question
and Answer page, go to Tollerhealth.com
To order a Toller progressive red cone degeneration
(prcd) blood test:
Detailed instructions are available from OptiGen's website that
explain how to ship a sample, request a test and information about
the Toller prcd test.