Daphnia magna shows reduced infection upon secondary exposure to a pathogen.

Daphnia magna shows reduced infection upon secondary exposure to a pathogen.
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麦克麦纳(Daphnia Magna)在暴露于病原体后的感染降低。

DOI:
10.1098/rsbl.2012.0581
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发表时间:
2012-12-23
期刊:
影响因子:
3.3
通讯作者:
Little TJ
Little TJ
中科院分区:
生物学2区
文献类型:
--
作者:
McTaggart SJ;Wilson PJ;Little TJ

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既往接触病原体是感染概率的重要预测因素。脊椎动物宿主对此有很深的理解,对于无脊椎动物宿主也是如此。在这里,我们测试在自然宿主-病原体系统中,最初的病原体暴露是否会将感染结果改变为次生病原体暴露。宿主最初暴露于感染性病原体菌株、非感染性病原体菌株或对照。同一宿主接受了第二次接触,这一次是在第一次接触后立即或48小时后,接触到一种感染的病原体菌株。我们观察到,与对照组相比,与病原体的最初接触总是提供对感染的保护。
Previous pathogen exposure is an important predictor of the probability of becoming infected. This is deeply understood for vertebrate hosts, and increasingly so for invertebrate hosts. Here, we test if an initial pathogen exposure changes the infection outcome to a secondary pathogen exposure in the natural host–pathogen system Daphnia magna and Pasteuria ramosa. Hosts were initially exposed to an infective pathogen strain, a non-infective pathogen strain or a control. The same hosts underwent a second exposure, this time to an infective pathogen strain, either immediately after the initial encounter or 48 h later. We observed that an initial encounter with a pathogen always conferred protection against infection compared with controls.
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