Vibrio harveyi co-infected with Cryptocaryon irritans to orange-spotted groupers Epinephelus coioides
文献类型： 外文期刊
作者： Lai, Xueli 1 ; Wu, Huicheng 1 ; Guo, Wenjie 1 ; Li, Xiong 1 ; Wang, Jiule 1 ; Duan, Yafei 2 ; Zhang, Peng 3 ; Huang, Zelin 4 ; Li, Yanwei 1 ; Dong, Guixin 3 ; Dan, Xueming 1 ; Mo, Zequan 1 ;
作者机构： 1.South China Agr Univ, Univ Joint Lab Guangdong Prov Hong Kong & Macao Re, Coll Marine Sci, Guangzhou 510642, Peoples R China
2.Chinese Acad Fishery Sci, Key Lab South China Sea Fishery Resources Exploita, Guangdong Prov Key Lab Fishery Ecol & Environm, South China Sea Fisheries Res Inst,Minist Agr & Ru, Guangzhou 510300, Peoples R China
3.Guangdong Chimelong Grp Co Ltd, Guangzhou 511430, Peoples R China
4.Chimelong Ocean Kindom Co Ltd, Zhuhai 519031, Peoples R China
5.Guangdong South China Rare Wild Anim Species Conse, Zhuhai 519031, Peoples R China
关键词： Cryptocaryon irritans; Vibrio harveyi; Epinephelus coioides; Coinfection
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.7； 五年影响因子：4.7 ）
ISSN： 1050-4648
年卷期： 2023 年 139 卷
页码：
收录情况： SCI
摘要： The orange-spotted grouper (Epinephelus coioides) is a high economic value aquacultural fish in China, however, it often suffers from the outbreak of parasitic ciliate Cryptocaryon irritans as well as bacterium Vibrio harveyi which bring great loss in grouper farming. In the present study, we established a high dose C. irritans localinfected model which caused the mortality of groupers which showed low vitality and histopathological analysis demonstrated inflammatory response and degeneration in infected skin, gill and liver. In addition, gene expression of inflammatory cytokines was detected to assist the estimate of inflammatory response. Furthermore, we also found that the activity of Na+/K+ ATPase in gill was decreased in groupers infected C. irritans and the concentration of Na+/Cl- in blood were varied. Base on the morbidity symptom occurring in noninfected organs, we hypothesized that the result of morbidity and mortality were due to secondary bacterial infection post parasitism of C. irritans. Moreover, four strains of bacteria were isolated from the infected site skin and liver of local-infected groupers which were identified as V. harveyi in accordance of phenotypic traits, biochemical characterization and molecular analysis of 16S rDNA genes, housekeeping genes (gyrB and cpn60) and speciesspecific gene Vhhp2. Regression tests of injecting the isolated strain V. harveyi has showed high pathogenicity to groupers. In conclusion, these findings provide the evidence of coinfections with C. irritans and V. harveyi in orange-spotted grouper.
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