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- W2008396783 abstract "Abstract Salmonid cryptobiosis is caused by the haemoflagellate, Cryptobia (Trypanoplasma) salmositica Katz 1951. The parasite has been reported from all species of Pacific Oncorhynchus spp. on the west coast of North America. It is recognized as a lethal pathogen in semi-natural and intensive salmon culture facilities, and there is no chemotherapy against the parasite. Innate and acquired immunity have been successfully exploited to experimentally protect susceptible fish. The third approach in the protective strategy is to use monoclonal antibody technology to develop a sensitive technique for the detection of parasite antigen, and to identify a protective monoclonal antibody and its epitope. A murine IgG3 monoclonal antibody (MAb-007) against the 47 kDa polypeptide of C. salmositica was used to develop an antigen-capture ELISA diagnostic technique. The reactions were negative before infection or vaccination, but were positive 1–9 weeks after infection with the pathogen or vaccination with an attenuated strain. MAb-007 recognizes a cytoplasmic epitope, which is excreted/secreted by living parasites. Another murine monoclonal antibody (MAb-001), an IgG1, was produced against an outer surface 200 kDa membrane glycoprotein (Cs-gp200). This glycoprotein epitope is specific to C. salmositica , and attaches to the surface membrane by a phospholipid anchor. MAb-001 agglutinates the parasite but does not fix complement. The antibody inhibits the activities of both cysteine and metallo-proteases from the pathogen. Parasites coated with MAb-001 do not multiply in culture, and they die in about 3 weeks. The infectivity of antibody-coated parasite to fish was also significantly decreased. Also, MAb-001 injected intraperitoneally into fish with acute disease significantly lowered the parasitaemias (60–80%) within 48 h. This monoclonal antibody is species specific. The partial characterization of the glycoprotein epitope on Cs-gp200 is the first step towards the development of a subunit vaccine against the pathogen. Monoclonal antibody technology is useful, and it will likely be used more often in the future to study parasitic diseases of fish." @default.
- W2008396783 created "2016-06-24" @default.
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- W2008396783 date "1999-07-01" @default.
- W2008396783 modified "2023-09-27" @default.
- W2008396783 title "The use of monoclonal antibody probes in salmonid cryptobiosis" @default.
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- W2008396783 doi "https://doi.org/10.1016/s0044-8486(99)00094-0" @default.
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