Wall A E
Fish Vet Group, Inverness.
Vet Rec. 1998 Jun 6;142(23):626-31. doi: 10.1136/vr.142.23.626.
From 1995 to 1997 cataracts were observed in Atlantic salmon (Salmo salar) in Ireland, Norway and Scotland at around the time of smoltification (when freshwater fish become adapted to the hypertonic seawater) in both fresh- and seawater fish. Over 38,000 fish were screened for the presence of cataracts. Posterior cortical cataracts were the earliest and most consistent change, followed by perinuclear, equatorial and anterior cortical cataracts. On histological examination vacuolation of the lens fibres was consistently present in the posterior cortex. The pattern of the outbreak suggested that a nutritional factor was involved although the variable incidence and severity of the condition indicated that a number of modifying factors may have been involved in the expression of the condition.
1995年至1997年期间，在爱尔兰、挪威和苏格兰，大西洋鲑（Salmo salar）在洄游期（淡水鱼适应高渗海水的时期）时，淡水鱼和海水鱼中均出现了白内障。超过38000条鱼被筛查是否患有白内障。后皮质性白内障是最早且最常见的变化，其次是核周、赤道和前皮质性白内障。组织学检查显示，晶状体纤维空泡化在后皮质中始终存在。疫情的爆发模式表明，虽然该病的发病率和严重程度各不相同，提示可能有多种调节因素参与了该病的表现，但其中涉及营养因素。
