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首页> 外文期刊>Parasitology >Parasitic infections in mixed system-based heliciculture farms: dynamics and key epidemiological factors.
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Parasitic infections in mixed system-based heliciculture farms: dynamics and key epidemiological factors.

机译：基于混合系统的螺旋养殖场中的寄生虫感染：动态和主要流行病学因素。

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摘要

Heliciculture is an excellent alternative to obtain edible snails but its viability is seriously threatened by pathogens. A parasitological survey was conducted in 3 mixed system-based heliciculture farms in Galicia (NW Spain), with the species Tetrahymena rostrata, Tetrahymena limacis, Tetratrichomonas limacis, Cryptobia helicogenae, Brachylaima aspersae (metacercariae and sporocysts), Alloionema appendiculatum, Nemhelix bakeri, and Riccardoella limacum being commonly found infecting Helix aspersa aspersa (petit-gris) snails. With the exception of C. helicogenae, N. bakeri, and B. aspersae sporocysts, all species were also detected in Helix aspersa maxima (gros-gris) snails, although generally with lower parameters. Most monoxenous infections, and consequently multiple parasitism, exhibited a rising trend during the first 2 months of intensive mating, with tendencies being slowed down or even reversed during the third month as a result of accumulated mortality and a sampling-derived reduction in host density. No parasites were vertically transmitted and infections were initially acquired from invading gastropod and micromammal reservoirs during fattening. Finally, artificial hibernation reduced significantly the prevalence of most species. These results confirm the importance of parasites in heliciculture and emphasize the need to prevent the entry of wild reservoirs into the farms and to rapidly remove the carcasses of dead snails from the reproduction units and fattening pens.
机译：螺旋藻是获得可食蜗牛的绝佳选择，但其生存能力受到病原体的严重威胁。在加利西亚（西班牙西北部）的三个基于混合系统的螺旋藻养殖场中进行了寄生虫调查，其中包括罗氏沼虾（Tetrahymena rostrata），利氏四膜虫（Tetrahymena limacis），利氏Tetratrichomonas，隐孢子虫（Cryptobia helicogenae），短枝曲霉（Brachylaima aspersae）（metacercariae和孢子囊），异形纲Riccardoella limacum通常被发现感染螺旋as虫（aslixa aspersa）（小格里斯）蜗牛。除螺旋形念珠菌，面包形猪笼草和曲霉芽孢杆菌的孢子囊外，在最大螺旋藻中也检测到所有物种，尽管通常参数较低。在密集交配的最初两个月中，大多数单性感染以及随之而来的多种寄生虫病呈上升趋势，由于累积的死亡率和抽样推导的宿主密度降低，趋势在第三个月减慢甚至逆转。没有寄生虫被垂直传播，并且在育肥期间最初是从入侵的腹足动物和微乳储库获得感染的。最后，人工冬眠大大降低了大多数物种的流行率。这些结果证实了寄生虫在螺旋藻养殖中的重要性，并强调需要防止野生水库进入农场，并从繁殖单位和育肥猪中迅速清除死蜗牛的尸体。

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