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OFA E*News (OFA電子新聞) 2006年9、10月份第一報 

有關OFA系列文章及指導手冊,有系統的翻譯和大家分享

版主: 泡泡拔

OFA E*News (OFA電子新聞) 2006年9、10月份第一報

文章泡泡拔 » 2006-10-14, 22:07

轉載本系列文章請請註明出處:
犬髖關節狗友會(www.dogchd.net)泡泡拔 阮振維譯自www.offa.org

2006年對OFA來說是值得慶祝的一年,除了是OFA的40週年慶之外,也在九月誕生了第一百萬
隻接受OFA檢查的狗,這是極重要的里程碑,表示OFA的資料庫將更具公信力與參考價值。
加上CHIC(Canine Health Information Center 犬健康資訊中心)的成立,
將多方的研究成果、測試與資訊加以整合,今後獸醫、科學家、繁殖者與飼主,
將能夠更快掌握各種疾病的相關資訊,為促進狗的健康而努力。

所以從今年九月開始,OFA每兩個月會推出一份電子新聞,把一些新的資訊帶給大家,
我也將盡力將這些新聞翻譯後放上來 !

泡泡爸

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Reducing the Impact of Hip Dysplasia
降低髖關節發育不全的影響

by Rhonda Hovan

Nearly everyone who has seriously bred, trained, or competed with
a breed at risk for hip dysplasia is aware of how devastating the news
can be that a special dog is affected. The impact may be measured in
a number of ways, including dashed hopes and dreams, lost monetary
investment in the dog, time lost to a breeding or competition program,
wasted effort spent training and preparing the dog, the emotional toll on
the family, and of course, concern for the dog. Generally all of these fa
ctors contribute to a sense of loss, distress, and heartbreak that is all too
familiar to those involved with dogs as a hobby, sport, or profession.

While conscientious breeders and owners attempt to reduce the incidence
of hip dysplasia through careful breeding and management decisions, current
tools are imperfect, and the possibility of HD looms as a significant concern in
young dogs of many breeds. However, there is another important way to reduce
the impact of this disease that is often overlooked.

Early preliminary radiographs, done as young as four months of age, have proven
to have a high degree of accuracy when submitted to OFA for evaluation (Corley et al, 1997).
A study of over 2300 dogs showed that dogs rated Excellent on preliminary evaluations
received normal evaluations as adults 100% of the time, and dogs rated Good on
preliminary evaluations received normal evaluations as adults 97.9% of the time. Dogs
rated Fair on preliminary evaluations were more likely to become abnormal as adults, but
even Fairs remained normal as adults 76.9% of the time.

Statistics are similarly impressive for dogs evaluated by OFA as dysplastic on preliminary
radiographs, as 97.4% of dogs receiving a preliminary rating of Moderate were evaluated
as having hip dysplasia as adults; and 84.4% ofthose receiving a preliminary rating of Mild
were evaluated as having HD as adults.

This data has tremendous implications for breeders,owners, and trainers, because it
demonstrates the reliability of a tool to help guide decisions about the future of young
dogs prior to the investment of precious resources. While the diagnosis of hip dysplasia is
disappointing at any age, it is certainly easier to recover from plans that must be altered
when the dog is four-to-six months of age, rather than when the dog is two years of age.
Similarly, owners can feel more confident in developing a dog’s full potential when a
preliminary radiograph has been evaluated by OFA as having a Good or Excellent rating.
Owners of dogs receivinga Fair, Borderline or Mild rating may wish to submit a second
preliminary radiograph fourto- six months after the first, because results tend to become
more reliable as a dog ages.

There is no substitute for a conscientious breeding program, but hopes and dreams for that
youngster may be more appropriately nurtured whenearly preliminary radiographs have been
used to help guide plans and decisions. And a great deal of distress and heartbreak can be
reduced when an owner learns at a very young age that a dog is not a good candidate to meet
certain goals.

任何致力於特定品種繁殖、訓練或競賽的人,都承擔著髖關節發育不全的風險,
而這些人也很明白,當一隻很特別的狗受到CHD的影響時,這個消息將會有多麼的令人沮喪。
而它帶來的影響也將擴及各個層面,包括希望與夢想的破碎、金錢投資的損失、花費在繁殖與競賽的時間全盤浪費、
犬隻訓練與培養的努力付諸流水、還有整個家庭在感情上的損失,而想當然的,更會為這些狗兒感到憂心。
一般來說,這所有因素都將密切的影響那些利用犬隻進行業餘、運動競技與專業活動的飼主,造成他們理智的喪失、悲痛苦惱與心痛。


當有良知的繁殖者與飼主,想藉由謹慎的繁殖與篩選管理來試圖降低 CHD的發生率時,
會發現目前能使用的工具大多是不完美的,因為在許多品種的年輕狗兒身上,
發生CHD的可能性還是隱約成為一個必須被關心的議題。
不過雖然我們目前沒有完美的工具來杜絕CHD的發生,還是有一個很重要卻常常被忽略的方式,可以降低這個疾病所帶來的影響,那就是犬隻早期的初步X光檢查,執行時間大約是狗齡4個月,這個時間點所做的初步X光檢查被送到OFA評估時,被證明具有很高的準確性(Corley et al, 1997)。

有一個樣本數超過2300隻狗的研究指出當犬隻在幼年的初步檢查,得到的髖關節等級是“極佳(Excellent)”時,這些狗在成犬之後,有100%會得到“正常(Normal)”的評估。而當犬隻在幼年的初步檢查得到的是“良好(Good)”等級時,有97.9%的狗在成年後會得到“正常(Normal)”的評估。若初步檢查的結果是“普通(Fair)”等級,這些狗會有比較高的傾向在成犬後變成“異常(abnormal)”,不過成犬後依然維持在正常狀態的狗仍佔了76.9%如果針對被OFA在初步檢查評估為“發育不全(dysplastic)”的狗做統計,這些統計數字同樣令人印象深刻。有97.4%在初步檢查得到 “中度發育不全(Moderate)”的狗,在成犬後被評定為發育不全。而有84.4%在初步檢查得到 “輕度發育不全(Mild)”的狗,在成犬後被評定為發育不全。


這些資料給了繁殖者、飼主與訓犬師極大的暗示,因為這些資料證明了這個檢查工具的可信度,並且可以在我們投入珍貴的資源之前,幫助我們為年輕犬隻的將來做出決定。不論在哪一個年紀,髖關節發育不全的診斷總是令人感到失望,不過相較於在狗狗兩歲時才得知CHD的診斷,如果能在狗齡4~6個月就得知CHD診斷,這樣要從計畫被迫改變的失望中恢復過來,就顯得容易許多了。同樣的,當在OFA的X光初步檢查獲得“極佳(Excellent)”與“良好(Good)”的等級時,飼主也才能更有信心的去發展狗狗全部的潛能。如果狗狗獲得了“普通(Fair)”“瀕危(Borderline)”“輕微(Mild)”的等級,飼主也許可以試著在第一次檢查的4~6個月後再做一次X光檢查,這樣結果將會變得更加可信。

秉持著誠實良知的繁殖模式將無可取代,但為了替不斷來臨的年輕生命構築希望與夢想,我們就必須透過X光初步檢查來幫忙擬訂計畫與做出決定。當飼主能夠學會不要替太年輕的狗設定某些目標時,將可以降低CHD所帶來的大量悲痛與心碎。
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文章: 85
註冊時間: 2006-02-04, 18:01
來自: 花蓮
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