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White line disease -- an update.

机译：白线病-更新。

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White line disease (WLD) is a term used to describe a keratolytic process on the solar surface of the hoof, characterised by a progressive separation of the inner zone of the hoof wall (R.F. Redden, personal communication). The separation occurs in the nonpigmented horn at the junction between the stratum medium and the stratum lamellatum. This separation is invaded by opportunistic bacteria/fungi at the toe, quarter and/or heel leading to infection, which progresses to varying heights and configurations toward the coronet. The disease process occurs secondary to a primary hoof problem such as chronic laminitis, abnormal hoof conformation, hoof imbalance or any other condition that causes a hoof wall separation. The disease has been termed seedy toe, yeast infection, Candida and onychomycosis. Onychomycosis is a mycotic disease that originates in the nail bed of man and dog. By contrast, in WLD the infection originates at the solar surface of the hoof and migrates proximally, approaching the coronary band but never invading it. In a recent report, keratophilic fungi were the only microorganisms isolated from the proximal limits of the separated area of the hoof wall (Ball 2000). However, in many cases of WLD, the pathogens cultured are purely bacterial or a mix of bacterial and fungal organisms. Until proven otherwise, onychomycosis may not be the appropriate term when referring to white line disease in the horse.
机译：白线病（WLD）是一个术语，用于描述马蹄日光表面的角质层分解过程，其特征是马蹄壁的内部区域逐渐分离（R.F. Redden，个人交流）。分离发生在无色素的角质层中，在角质层和层间的交界处。这种分离受到脚趾，四分之一和/或脚跟处的机会细菌/真菌的侵袭，导致感染，这种感染会朝着皇冠发展成不同的高度和形态。该疾病过程继发于主要的蹄类问题，例如慢性椎板炎，异常的蹄形，蹄的不平衡或引起蹄壁分离的任何其他情况。该疾病被称为脚趾，酵母感染，念珠菌和灰指甲。灰指甲病是一种真菌病，起源于人和狗的指甲床。相比之下，在WLD中，感染起源于蹄的日光表面，并向近端迁移，接近冠状动脉带，但从未侵入。在最近的一份报告中，从蹄壁分离区域的近端限制中分离出的唯一微生物是角化性真菌（Ball，2000年）。但是，在WLD的许多情况下，培养的病原体是纯细菌或细菌和真菌生物的混合物。除非另有证明，否则在提到马的白线病时，灰指甲可能不是合适的术语。

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