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DU Guangxun, QU Lingyun, SHANG Kun, SUN Chengjun, WANG Chen, GAO Ping. Ciliate Uronema marinum is the causative agent of scuticociliatosis in farm raised turbot Scophthalmus maximus[J]. HaiyangYuHuZhao, 2019, 37(5): 1726-1735

Ciliate Uronema marinum is the causative agent of scuticociliatosis in farm raised turbot Scophthalmus maximus

DU Guangxun1, QU Lingyun1,2, SHANG Kun1,3, SUN Chengjun1, WANG Chen1, GAO Ping1
1 First Institute of Oceanography, Ministry of Natural Resources(MNR), Qingdao 266061, China;
2 Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China;
3 College of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
To identify the pathogen that causes scuticociliatosis in farmed-raised turbot Scophthalmus maximus, we isolated a ciliate from the brain tissue of an infected turbot and identified it as Uronema marinum based on morphological and molecular evidence. We then infected the turbots in artificial laboratory settings with pure cultured U. marinum. The infected turbots showed syndromes similar to those observed in naturally infected ones. Furthermore, microscopic examination and PCR detection confirmed the presence of the ciliate in the tissues of those laboratory-infected turbots. To our best knowledge, this is the first report of scuticociliatosis caused by U. marinum in farm-raised turbot S. maximus in China.
Key words:    Scophthalmus maximus|scuticociliatosis|histopathology|Uronema marinum   
Received: 2018-10-18   Revised: 2018-12-20
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