Generation and evaluation of virulence attenuated mutants of Edwardsiella tarda as vaccine candidates to combat edwardsiellosis in flounder (Paralichthys olivaceus)

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	Generation and evaluation of virulence attenuated mutants of Edwardsiella tarda as vaccine candidates to combat edwardsiellosis in flounder (Paralichthys olivaceus)
	Li, Jie1,2 ; Mo, Zhaolan 1,2; Li, Guiyang 1,2; Xiao, Peng 3; Huang, Jie 1,2
刊名	FISH & SHELLFISH IMMUNOLOGY
	2015-03-01
卷号	43 期号:1 页码:175-180
关键词	Attenuated mutant Edwardsiella tarda Edwardsiellosis Immune protection Paralichthys olivaceus
英文摘要	Edwardsiella tarda is an intracellular pathogen that causes edwardsiellosis in fish. The development of a live attenuated vaccine may be an effective approach for preventing this disease in fish. In this study, we introduced deletions of esrB, esaC, evpH, rpoS, and purA into the E. tarda LSE40 Delta aroA strain, thereby generating five double-gene mutants (6,aroA,6,esrB, Delta aroA Delta esaC, Delta aroA Delta rpoS, Delta aroA Delta evpH, and Delta arolA Delta purA) and two triple-gene mutants (Delta aroA Delta esrB Delta evpH and Delta aroA Delta esaC Delta evpH). When blue gourami (Trichogaster trichopterus) was used as a fish model for the primary screening and evaluation of the vaccine candidates, all mutants were attenuated significantly by more than 2 to 3 logs in terms of the 50% lethal dose (LD50). Five double-gene mutants yielded relative percentage survival (RPS) rates of 26.1 82.6% after challenge with wild-type E. tarda. The Delta aroA Delta esrB mutant that conferred the highest RPS (82.6%) in blue gourami was also evaluated in flounder (Paralichthys olivaceus). After vaccination via intramuscular (i.m.) injection or immersion, this mutant could persist in the flounder for 14-35 days and it induced higher serum antibody titers than the control fish (P < 0.01). Flounder vaccinated via i.m. injection at doses of 10(3)-10(7) CFU/flsh had RPS rates of 14.3-66.7% after i.m. challenge with 104 CFU/fish using wild-type E. tarda. Flounder vaccinated via immersion at a dose of 10(7) CFU/ml exhibited 100% RPS against immersion challenge with 10(7) CFU/ml using wild-type E. tarda. These results indicate that the Delta aroA Delta esrB mutant could be used as an effective live vaccine to combat edwardsiellosis in flounder. (C) 2015 Elsevier Ltd. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000349731400020
公开日期	2015-06-16
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/25377]
专题	海洋研究所_实验海洋生物学重点实验室
作者单位	1.Chinese Acad Fishery Sci, Key Lab Sustainable Dev Marine Fisheries, Minist Agr, Yellow Sea Fisheries Res Inst, Qingdao, Peoples R China 2.Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Li, Jie,Mo, Zhaolan,Li, Guiyang,et al. Generation and evaluation of virulence attenuated mutants of Edwardsiella tarda as vaccine candidates to combat edwardsiellosis in flounder (Paralichthys olivaceus)[J]. FISH & SHELLFISH IMMUNOLOGY,2015,43(1):175-180.
APA	Li, Jie,Mo, Zhaolan,Li, Guiyang,Xiao, Peng,&Huang, Jie.(2015).Generation and evaluation of virulence attenuated mutants of Edwardsiella tarda as vaccine candidates to combat edwardsiellosis in flounder (Paralichthys olivaceus).FISH & SHELLFISH IMMUNOLOGY,43(1),175-180.
MLA	Li, Jie,et al."Generation and evaluation of virulence attenuated mutants of Edwardsiella tarda as vaccine candidates to combat edwardsiellosis in flounder (Paralichthys olivaceus)".FISH & SHELLFISH IMMUNOLOGY 43.1(2015):175-180.