Abstract：
Myxozoans are obligate parasites with complex life cycles, typically infecting fish and annelids. Here, we examined annelids from fish farm pond sediments in the Beit Shean Valley, in the Syrian-African Rift Valley, Israel, for myxozoan infections. We examined 1486 oligochaetes, and found 74 (5 %) were infected with actinospore stages. We used mitochondrial 16S sequencing to infer identity of 25 infected annelids as species of Potamothrix, Psammoryctides, Tubifex and Dero. We identified 7 myxozoan types from collective groups Neoactinomyxum and Sphaeractinomyxon, and characterized them by small subunit ribosomal DNA sequencing. The Neoactinomyxum type was genetically most similar (∼93 %) to cyprinid fish-infecting Myxobolus spp. The six Sphaeractinomyxon types were genetically similar (93-100 %) to Mugilid-infecting Myxobolus spp.; with one being the previously unknown actinospore stage of a myxospore that infects mullet from aquaculture from the Israeli coast of the Mediterranean Sea. As the farm pond system is artificial and geographically isolated from the Mediterranean, the presence of at least seven myxozoans in their annelid hosts demonstrates introduction and establishment of these parasites in a novel, brackish environment.
摘要：
粘液虫是具有复杂生命周期的专性寄生虫，通常感染鱼类和环节动物。这里,我们检查了贝特谢恩山谷鱼场池塘沉积物中的环节动物，在叙利亚-非洲裂谷，以色列,粘液菌感染.我们检查了1486个寡头，发现74例（5％）感染了放线孢子阶段。我们使用线粒体16S测序来推断25种感染的环节动物作为Potamothrix物种的身份，Psammorycids,Tubifex和Dero.我们从新放线菌和Sphaer放线菌群中鉴定出7种粘液菌类型，并通过小亚基核糖体DNA测序来表征它们。新放线菌类型在遗传上与感染鲤鱼的Myxobolus属物种最相似（〜93％）。六种Sphaerac放线菌类型在遗传上与感染Mugilid的Myxobolus属相似（93-100％）。；其中一个是以前未知的粘液孢子的放线孢子阶段，该孢子感染来自地中海以色列海岸水产养殖的鱼。由于农场池塘系统是人工的，在地理上与地中海隔离，至少七种黏液虫在它们的食环虫宿主中的存在证明了这些寄生虫在一部小说中的引入和建立，微咸的环境。
