A 17‐month‐old boy from Vancouver, Canada, presented with a 5‐day history of progressive somnolence, ataxia, and torticollis. Additional investigations revealed eosinophilic encephalitis with deep white matter changes on MR imaging. On day 13, serology came back positive for Baylisascaris procyonis antibodies. While prophylaxis after ingestion of soil or materials potentially contaminated with raccoon feces can prevent baylisascariasis, timely treatment can sometimes alter a disastrous outcome. Populations of infected raccoons are propagating globally, but cases of Baylisascaris neural larva migrans have so far only been reported from North America.

中文翻译：

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Baylisascariasis：由于新出现的浣熊圆虫，患有神经幼虫移行的小男孩。

来自加拿大温哥华的一个17个月大男孩表现出进行性嗜睡，共济失调和斜颈的5天病史。进一步的调查显示，嗜酸性粒细胞性脑炎的MR影像学表现为深部白质改变。在第13天，血清学检出Baylisascaris procyonis抗体呈阳性。虽然在摄入可能被浣熊粪便污染的土壤或材料后进行预防可以预防Baylisascariasis，但及时治疗有时可能会导致灾难性的后果。受感染的浣熊种群正在全球范围内繁殖，但是迄今为止，仅从北美报道了Baylisascaris神经幼虫迁徙的病例。