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首页> 外文期刊>Parasitology >Rethinking the role of invertebrate hosts in the life cycle of the amphibian chytridiomycosis pathogen
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Rethinking the role of invertebrate hosts in the life cycle of the amphibian chytridiomycosis pathogen

机译：重新思考无脊椎动物宿主在两栖乳糜菌病原体生命周期中的作用

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摘要

The amphibian pathogen Batrachochytrium dendrobatidis (Bd) has recently emerged as a primary factor behind declining global amphibian populations. Much about the basic biology of the pathogen is unknown, however, such as its true ecological niche and life cycle. Here we evaluated invertebrates as infection models by inoculating host species that had previously been suggested to be parasitized in laboratory settings: crayfish (Procambarus alleni) and nematodes (Caenorhabditis elegans). We found neither negative effects on either host nor evidence of persistent infection despite using higher inoculum loads and more pathogen genotypes than tested in previous studies. In contrast, addition of Bd to C. elegans cultures had a slight positive effect on host growth. Bd DNA was detected on the carapace of 2/34 crayfish 7 weeks post-inoculation, suggesting some means of persistence in the mesocosm. These results question the role of invertebrates as alternative hosts of Bd and their ability to modulate disease dynamics.
机译：两栖动物病原体巴氏梭菌（Badchochochytrium dendrobatidis，Bd）最近已成为全球两栖动物数量下降的主要因素。然而，关于病原体的基本生物学的许多知识还不得而知，例如其真正的生态位和生命周期。在这里，我们通过接种以前被认为在实验室环境中被寄生的宿主物种，将无脊椎动物作为感染模型进行了评估：小龙虾（小螯虾）和线虫（秀丽隐杆线虫）。尽管没有使用比以前的研究更高的接种量和更多的病原体基因型，但我们没有发现对宿主或持续感染的负面影响。相反，在秀丽隐杆线虫培养物中添加Bd对宿主的生长有轻微的积极影响。接种后7周，在2/34小龙虾的甲壳中检测到了Bd DNA，这表明在包膜中存在一些持久性手段。这些结果质疑无脊椎动物作为Bd替代宿主的作用及其调节疾病动态的能力。

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