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  • 1
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. Vaccination with crude lipopolysaccharide (LPS) induced better protection against infection with Aeromonas hydrophila in carp than vaccination with formalin killed vaccine. Dipping fish in vaccine for 2 h at 25°C was more effective than intraperitoneal injection of the vaccine in procedural simplicity, lower stress loading and the degree of protection acquired. In carp immunized with crude LPS by the dip method, antibodies were not detected by bacteriai agglutination, passive haemagglutination and the agar diffusion tests. The results indicate that the protection against A. hydrophila infection in carp is not dependent on humoral immunity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 11 (1988), S. 0 
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. The mechanism of protection against Aeromonas hydrophila infection in carp was studied. Recipient fish, into which pronephric cells from carp previously immunized by dipping in bacterial crude lipopolysaccharide (LPS) at 25°C for 2h were transferred, demonstrated almost the same level of protective ability as an immunized control group. The protective ability was transmitted by non-adherent (to nylon fibre) immune pronephric cells. These non-adherent cells were damaged by anti-carp thymocyte serum and were, thus, considered to be T-like cells. The protective ability was depressed in immunized carp treated with anti-carp thymocyte serum in vivo and was also remarkably reduced in immunized carp whose macrophage function was impaired by Dextran sulphate-500 treatment. These results indicate that the protection shown by carp immunized by dipping in crude LPS is dependent on cellular immunity regulated by a T-like cell-macrophage system.
    Type of Medium: Electronic Resource
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