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Description of a new Neoactinomyxum type actinosporean from the oligochaete Branchiura sowerbyi Beddard

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Abstract

Actinosporean infection of oligochaetes living in the mud of a commercial gibel carp pond with myxosporean disease was studied. Six actinospore types were detected exclusively from the oligochaete Branchiura sowerbyi Beddard with very high prevalence (18%). Five out of the six types were identified as the same actinosporeans described in previous reports, the sixth actinosporean was identified as a new Neoactinomyxum type and described here based on morphological and molecular characterisation. Spore body of the actinospore was globular, much smaller than caudal processes. Three caudal processes were disc-like in apical view, hemispherical in side view, closer together and encircling the spore body. The number of sporoplasm cells was detected as eight in one specimen. The new actinosporean markedly differed from other Neoactinomyxum types in literature having much bigger caudal processes. DNA sequence analyses further confirmed the morphological identification, and revealed the actinosporean described here (KU641392) possessed less than 94% sequence similarity with myxozoans available in the GenBank database.

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Funding

This research was supported by the Natural Sciences Foundation of China (No. 31302222), the earmarked fund for China Agriculture Research System (CARS-46), Jiangsu Fishery Project (D2015-13).

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Authors and Affiliations

  1. Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, 214081, China

    Bing Wen Xi, Peng Li, Kai Chen, Tao Teng & Jun Xie

  2. Wuxi Fishery College, Nanjing Agricultural University, Wuxi, 210095, China

    Peng Li & Tao Teng

  3. Nanyang Medical College, Nanyang, 473061, China

    Qing Chun Liu

Authors
  1. Bing Wen Xi
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  2. Peng Li
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  3. Qing Chun Liu
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  4. Kai Chen
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  5. Tao Teng
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  6. Jun Xie
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Correspondence to Bing Wen Xi or Jun Xie.

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All applicable institutional, national and international guidelines for the care and use of animals were followed.

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Xi, B.W., Li, P., Liu, Q.C. et al. Description of a new Neoactinomyxum type actinosporean from the oligochaete Branchiura sowerbyi Beddard. Syst Parasitol 94, 73–80 (2017). https://doi.org/10.1007/s11230-016-9677-1

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  • DOI: https://doi.org/10.1007/s11230-016-9677-1

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