Morphology and aspects of growth of a trypanosome transmitted by the marine leech Johanssonia arctica (Piscicolidae) from Northern Norway
Morphology and aspects of growth of a trypanosome transmitted by the marine leech Johanssonia arctica (Piscicolidae) from Northern Norway
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DOI：
10.14411/fp.2005.028
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发表时间：
2005-09-01
影响因子：
1.6
通讯作者：
Nylund, A
中科院分区：
文献类型：
--
作者：
Karlsbakk, E;Haugen, E;Nylund, A
鱼水蛭Johansonia arctica（Johansson，1898）是从挪威北部Finnmark的帝王蟹Paralithodes camtschaticus（Tilesius，1815）中收集的，并允许在实验室中以实验鱼宿主为食。这种水蛭从实验室饲养的鳕鱼（Gadus morhua）和大比目鱼（Hippoglossus coriglossus）身上摄取血液。一些实验比目鱼获得锥虫感染，寄生虫血症之间约。500和60，000锥虫ml（-1）。锥虫大小不等，约39-90 μ m（平均57 μ m）。感染后81天。特征性的特征是细胞条纹，可触细胞质颗粒，前核和一个相对较长的（约。6 μ m，最大9 μ m）的距离从后端到动基体。随着生长，锥虫变得越来越细长，条纹越来越少，细胞核位置也越来越不明显。该锥虫被认为与东北大西洋的水蛭Calliobdella nodulifera（Malm，1863）传播的类型不同，但被认为与西北大西洋的J. arctica传播的锥虫是同种的。这种锥虫在过去被鉴定为Murmanensis Nikitin，1927，一种描述不多的物种。T.在C. nodulifera和J. arctica。我们建议，J. arctica传播的物种被认为是T。murmanensis Nikitin，1927 sensu stricto.
The fish leech Johanssonia arctica (Johansson, 1898) was collected from king crabs Paralithodes camtschaticus (Tilesius, 1815) in Finnmark, N Norway, and allowed to feed on experimental fish hosts in the laboratory. This leech ingested blood from laboratory-reared cod (Gadus morhua) and halibut (Hippoglossus hippoglossus). Some experimental halibut acquired trypanosome infection, with parasitaemia between ca. 500 and 60,000 trypanosomes ml(-1). The trypanosomes were of variable size and measured 39-90 mu m (mean 57 mu m) ca. 81 days post-infection. Characteristic features are cell striation, refractile cytoplasmic granules, anterior nucleus and a relatively long (ca. 6 mu m, max 9 mu m) distance from the posterior end to the kinetoplast. Following growth, the trypanosomes became increasingly slender, with fewer striae and a nucleus position less pronounced anterior. The trypanosome is considered distinct from a type transmitted by the leech Calliobdella nodulifera (Malm, 1863) in the NE Atlantic, but is regarded conspecific with a trypanosome transmitted by J. arctica in the NW Atlantic. This trypanosome has in the past been identified as Trypanosoma murmanensis Nikitin, 1927, a poorly described species. T. murmanensis cannot be recognized with certainty among the trypanosomes transmitted by C. nodulifera and J. arctica respectively. We propose that the J. arctica-transmitted species is considered T. murmanensis Nikitin, 1927 sensu stricto.