In the year 2000, there were approximately 1015 cavaliers examined by ophthalmologists that reported the results to the Canine Eye Registration Foundation. 103 with epithelial corneal dystrophy, 89 with distichiasis, 94 with folds, 38 with geographical retinal dysplasia, 5 with generalized retinal dysplasia, 93 with cataracts (72 of those diagnosed in dogs less than 7 years of age). There were only 4 cases of persistent hyaloid artery, all in dogs under six months of age.
That makes for approximately a 4% incidence of geographic or generalized retinal dysplasia, 9% incidence of folds, and a 9% incidence of cataracts, with at least 7% likely being "juvenile/hereditary" cataracts. In 1999, 1248 cavalier exams were reported to CERF, with an 8% incidence of cataracts, and a 5% incidence of geographic/generalized retinal dysplasia. There were 4 cases of persistent hyaloid artery reported, 2 under the age of 3 months, and 2 in the 1-3 years age category. Summary: the incidence of juvenile cataracts is greater than the incidence of geographic/retinal dysplasia. That may be either inherent to the breed, or because breeding stock with retinal dysplasia would most likely be eliminated even if only one CERF exam was done. For comparison with a similar (largely untested; only 100+ exams in 8 years) breed, the incidence of cataracts in Japanese Chin tested in the US is 15%; the incidence of retinal dysplasia about 5%. Leanne ========================================================= "Magic Commands": to stop receiving mail for awhile, click here and send the email: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL to start it up gain click here: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL E-mail [EMAIL PROTECTED] for assistance. Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html All e-mail sent through CKCS-L is Copyright 1999 by its original author.
