NEJM:加工肉类与2017年南非李斯特菌病

2020-02-13 MedSci MedSci原创

在2017年南非李斯特菌病疫情中,HIV感染及怀孕人群李斯特菌病发病率较高。通过全基因序列研究,证实泊隆尼香肠是本次疫情的源头

2017年,李斯特菌病在南非爆发,其来源不明。

近日,研究人员开展流行病学、追踪和环境调查,采用全基因组测序方法对单核细胞增生李斯特氏菌进行了分型。

在937例确诊患者中,465例(50%)为怀孕病例,其中406例(87%)新生儿为妊娠相关病例。 937例病例中,排除怀孕病例,229(24%)例年龄在15-49岁之间。在可获得HIV资料的患者中,38%的怀孕相关病例以及46%的其他病例HIV阳性。728名可获得预后情况的患者中,193人死亡(27%)。609名患者进行了分离株测序,567例为ST6型(93%)。病例对照分析中,ST6型感染者中,曾经食用过泊隆尼(Polony)香肠的比例较高(OR=8.55),Polony和环境样本可分离得到ST6,与患者分离物属于同一个核心基因组多位点序列分型簇,不超过4个等位基因差异,说明Polony可能是重要的单一致病因素。将该机构的加工肉类产品召回后,单核细胞增多症ST6感染的发病率迅速下降。

在2017年南非李斯特菌病疫情中,HIV感染及怀孕人群李斯特菌病发病率较高。通过全基因序列研究,证实泊隆尼香肠是本次疫情的源头。

原始出处:

Juno Thomas et al. Outbreak of Listeriosis in South Africa Associated with Processed Meat. N Engl J Med, February 13, 2020.

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

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    2020-02-15 hongbochen
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    2020-02-13 旺医

    顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息

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