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Fish vaccines:current state and future trends

Fish vaccines:current state and future trends

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中国工程院第77场工程科技论坛·2008水产科技论坛——渔业现代化与可持续发展

作者： Phillip H.Klesius craig a.shoemaker Joyce J.Evans Aquatic Animal Health Research Laboratory Agricultural Research ServiceU.S.Department of AgricultureAuburnAlabama 36832 and ChestertownMaryland 21620U.S.A.

A vaccine is a preventive tool used in a health management strategy for the control of infectious diseases in *** more than 100 years,vaccines have proved to be an effective tool for preventing infectious disease outbreaks in humans,poultry and other food *** aquaculture, the development and use of vaccines is now making rapid progress to achieve its full potential as effective disease prevention *** objective of vaccination is to provide a strong immune response to an administered antigen able to provide acquired long-term protection against a *** achieve this objective either a killed or modified live vaccine needs to be developed and licensed for use in fresh or marine water *** type of immunity needed,antibody and/or cell-mediated against,a particular pathogen is among the deciding factors in the development of a *** with a killed bacterial vaccine produces an antibody-mediated protection,but not cell-mediated *** and/or antibody-mediated immunity can be provided only by immunization with a modified live ***,antibody-mediated immunity provided by killed vaccines is relatively short lived in terms of protection(3-5 months).Longer protection(≥12 months)is provided by modified live *** duration of protection may be increased by the addition of an adjuvant to the killed *** adjuvant is a substance that increases specific immune responses against the co-inoculated *** vaccines are usually administered by intraperitonal and/or intramuscular injection of individual *** is the least cost effective in terms of labor and time. Modified live vaccines may be administered by bath immersion to large numbers of fish(fry and/or eggs)which is a more cost effective method of mass vaccination in both labor and *** vaccines are considered to be safer than modified live vaccines which may revert to ***, future trends include oral del

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Prevention of Ichthyophthirius multifiliis in fish using vaccination

Prevention of Ichthyophthirius multifiliis in fish using vac...

引用

中国工程院第77场工程科技论坛·2008水产科技论坛——渔业现代化与可持续发展

作者： Phillip H Klesius craig a.shoemaker USDA Agricultural Research ServiceAquatic Animal Health Research Laboratory 990 Wire RoadAuburnAL 36832-4352USA

Two immunization trials were conducted to evaluate immune responses and host protection of channel catfish Ictalurus punctatus and Nile tilapia,Oreochromis niloticus against Ichthyophthirius multifiliis(Ich)using live theronts and sonicated *** with live theronts or sonicated trophonts were done by both bath immersion and intraperitoneal(IP)*** and serum anti-Ich antibodies were measured 12 and 21 days post immunization for catfish and serum anti-Ich antibodies 12,25 and 180 days post immunization for *** survivals of catfish and tilapia were determined after theront ***-Ich antibodies titers were significantly higher(P<0.05)in catfish and tilapia immunized with live theronts by immersion or IP injection or with sonicated trophonts administed by IP *** contrast,fish immunized with sonicated trophonts by immersion and with bovine serum albumin(control)by IP injection had significantly lower antibody titers. Immunity was noted only in fish immunized with live theronts by immersion or IP injection or with sonicated trophonts by IP *** was a positive correlation between higher levels of antiIch antibodies and host survival in the immunized *** results of this study show the vaccination against Ich is an excellent alternative to chemical treatments.

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