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  • Title: The induction of species-specific immunity against Schistosoma japonicum by exposure of rats to ultra-violet attenuated cercariae.
    Author: Moloney NA, Webbe G, Hinchcliffe P.
    Journal: Parasitology; 1987 Feb; 94 ( Pt 1)():49-54. PubMed ID: 3103047.
    Abstract:
    Single percutaneous immunizations of Fischer rats with 1000 ultra-violet attenuated Schistosoma japonicum cercariae induced 52-88% resistance to challenge 4 weeks later. Increasing this to 3 immunizations induced 90% resistance to challenge, and this level of protection remained undiminished for up to 40 weeks after vaccination. Rats vaccinated with gamma-irradiated S. mansoni cercariae were resistant to challenge with S. mansoni but not S. japonicum. Similarly rats vaccinated with u.v.-attenuated S. japonicum cercariae were not resistant to heterologous challenge. Thus irradiated vaccines are species-specific in both permissive and non-permissive hosts.
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