Recent range expansions of whirling disease impelled us to understand the impacts of its causative agent, the myxozoan parasite Myxobolus cerebralis, on lesser-studied fish hosts. Mountain Whitefish Prosopium williamsoni overlap broadly with M. cerebralis across the western United States and Canada, and populations have experienced widespread declines since the 1990s. To evaluate effects of the parasite on Mountain Whitefish, we revisit formerly unpublished work of the Colorado Division of Wildlife (now Colorado Parks and Wildlife), comparing infection in age-matched Mountain Whitefish, Rainbow Trout Oncorhynchus mykiss, and Brown Trout Salmo trutta. To complement the original report, we reanalyze mortality data and include additional SEM imagery. Infection of M. cerebralis in juvenile Mountain Whitefish was characterized by a brief but heavy period of mortality in the first 2 weeks after exposure, with limited pathology. This clinical effect is unique among the known salmonid hosts of M. cerebralis.

中文翻译：

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脑粘液虫导致幼年山白鱼的孢子前死亡

最近旋风病的范围扩大促使我们了解其病原体，粘液动物寄生虫脑粘虫，对研究较少的鱼类宿主的影响。Mountain Whitefish Prosopium williamsoni在美国西部和加拿大与M. brainis广泛重叠，自 1990 年代以来，种群数量普遍下降。为了评估在山白鱼寄生虫的影响，我们重温野生动物（现科罗拉多州公园和野生动物）的科罗拉多司的前身是未发表的作品，在年龄匹配的山白鱼，红鳟鱼比较感染虹鳟和褐鳟褐鳟. 为了补充原始报告，我们重新分析了死亡率数据并包含了额外的 SEM 图像。幼年山白鱼感染脑白鲑的特点是在暴露后的前 2 周内有短暂但严重的死亡期，病理学有限。这种临床效果在已知的M. brainis 鲑鱼宿主中是独一无二的。