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Prevalence and heritability of distichiasis in the English Cocker spaniel

机译：英国可卡犬中的分布性疾病的患病率和遗传性

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BackgroundCanine distichiasis is a well-known cause of ocular irritation and excessive lacrimation (secretion of tears) in the dog. The term distichiasis originates from the Greek words di and stichos meaning two and rows, respectively, and as the name implies, the condition is characterized by an additional row of cilia, which erupts on the eyelid margin. Many purebred dogs are known to be predisposed to the condition, with many affected individuals within the populations. Even though the problem is widespread, the exact mode of inheritance and the heredity has not been studied extensively. However, some degree of genetic influence has been assumed, due to the high incidences within specific breeds. In the present study we have examined a cohort of English Cocker spaniels in Denmark to determine the prevalence and heritability of the disease. ResultsData from English Cocker spaniels with an ECVO eye examination registered between 2004–2013 were included in the study. The number of dogs examined during this period was 799, and the prevalence of distichiasis within this cohort was estimated at 49.31?% with a gender predisposition that females are more likely to get distichiasis than males. The correlation between the distichiasis status of the parents and their offspring revealed a significant association between the breeding combination of the parents and the occurrence of distichiasis in the offspring ( p ConclusionsThe prevalence of distichiasis in English Cocker spaniels from Denmark, examined in 2004–2013 was shown to be extremely high. The relative risk of developing the disease was 1.3 and 1.8 for offspring of one or two affected parents respectively. This together with the moderate to high heritability of the condition indicates that selective breeding could be used to reduce the incidence of distichiasis.
机译：背景犬双歧杆菌病是犬眼刺激和过度流泪（泪液分泌）的众所周知的原因。蠕虫病一词起源于希腊语di和stichos，分别表示两行和两行，顾名思义，该疾病的特征是另一行纤毛在眼睑边缘喷出。已知许多纯种狗易患此病，种群内有许多受影响的个体。尽管问题很普遍，但关于继承和遗传的确切方式尚未广泛研究。但是，由于特定品种中的高发率，已经假定了一定程度的遗传影响。在本研究中，我们检查了丹麦的一群英国可卡犬，以确定该疾病的患病率和遗传性。结果研究中包括来自2004年至2013年间进行ECVO眼睛检查的英国可卡犬的数据。在此期间检查的狗数量为799只，该人群中的双歧杆菌患病率估计为49.31％，其性别易感性是雌性比雄性犬更易患上双歧杆菌。父母及其后代的支原体感染状况之间的相关性表明，父母的育种组合与后代中的支原体感染之间存在显着相关性（p结论2004-2013年丹麦丹麦可卡犬的支原体感染率为一个或两个患病父母的后代患此病的相对风险分别为1.3和1.8，再加上该病的中度至高度遗传性，表明可以利用选择性育种来降低患病风险。排毒。

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