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首页> 外文期刊>Journal of Parasitology >LIFE CYCLE AND DESCRIPTION OF A NEW SPECIES OF BRACHYLAIMID (TREMATODA: DIGENEA) IN SPAIN
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LIFE CYCLE AND DESCRIPTION OF A NEW SPECIES OF BRACHYLAIMID (TREMATODA: DIGENEA) IN SPAIN

机译：在西班牙的生命周期和一种新的腕足动物（TREMATODA：DIGENEA）的描述

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摘要

The life cycle of Brachylaima llobregatensis n. sp. (Trematoda: Brachylaimidae) is elucidated. Embryonated, operculated, asymmetric eggs (30.9 × 18.2 μm) are eliminated with feces of natural hosts wood mouse Mus spretus; white-toothed shrew, Crocidura russula; and an experimental host, domestic mouse, Mus musculus var. domesticus. The eggs are ingested by the helicid gastropod Helix (Cornu) aspersa, the only natural and experimental first intermediate host. The miracidium hatches from the egg, infects the snails, and develops into a branched sporocyst in the digestive gland. Microcaudate cercariae emerge from this snail and develop into unencysted metacercariae in the kidney of second intermediate host snails H. (C.) aspersa and Otala punctata (natural hosts) and Theba pisana (experimental host). Ingestion of infected snails leads to the infection of definitive hosts, with the adults inhabiting the middle part of the small intestine. There is a chaetotaxic pattern specific on the acetabular (SII 5–6 papillae) and body (papillae absent on PII) levels. Three types of cercaria papillae were observed by scanning electron microscopy: argentophilic papillae with fingerlike processes (cephalic, body, and acetabular levels); argentophilic papillae with opening (2 papillae in the M body level); and nonargentophilic dome-shaped papillae (on the cephalic CII level, alternating with argentophilic SII papillae on the ventral sucker). Suckers are subequal, with the acetabulum located in the posterior part of the anterior third of body. Vitellaria extend from anterior margin of acetabulum to between middle level and anterior margin of anterior testis.
机译：Brachylaima llobregatensis n。的生命周期。 sp。 （Trematoda：Brachylaimidae）被阐明。用天然宿主木鼠（Mus spretus）的粪便消除了胚状，可操作的不对称卵（30.9×18.2μm）。白齿sh，Crocidura russula；和实验寄主，家鼠Mus musculus var。家养。卵被腹足动物螺旋螺旋藻（Cornu）aspersa摄取，这是唯一的天然和实验性第一中间宿主。 acid虫从卵中孵出，感染蜗牛，并在消化腺中发育成分支的孢子囊。微尾尾从该蜗牛中出来，并在第二个中间寄主蜗牛H.（C.）aspersa和Otala punctata（天然寄主）和Theba pisana（实验寄主）的肾脏中发展成未ency化的尾aria。食入感染的蜗牛会导致确定的宿主受到感染，成年动物栖息在小肠的中部。在髋臼（SII 5-6乳头）和身体（PII上不存在的乳头）水平上存在特定的chaetotaxic模式。通过扫描电子显微镜观察到了三种类型的尾pap乳头：具有指状突起的嗜银乳头（头，身体和髋臼水平）；具开孔的纯银乳头（M体水平2个乳头）;非亲和性圆顶形乳头（在头CII水平，在腹侧吸盘上与亲性SII乳头交替出现）。吸盘是次等的，髋臼位于身体前三分之一的后部。 tell骨从髋臼的前缘延伸到睾丸的中层和前缘之间。

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