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The induction of species-specific immunity against Schistosoma japonicum by exposure of rats to ultra-violet attenuated cercariae

Published online by Cambridge University Press:  06 April 2009

N. A. Moloney ,
G. Webbe  and
P. Hinchcliffe
N. A. Moloney
Affiliation:
Department of Helminthology, London School of Hygiene and Tropical Medicine, Winches Farm Field Station, 395 Hatfield Road, St Albans AL4 OXQ
G. Webbe
Affiliation:
Department of Helminthology, London School of Hygiene and Tropical Medicine, Winches Farm Field Station, 395 Hatfield Road, St Albans AL4 OXQ
P. Hinchcliffe
Affiliation:
Department of Helminthology, London School of Hygiene and Tropical Medicine, Winches Farm Field Station, 395 Hatfield Road, St Albans AL4 OXQ
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Summary

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.

Type
Research Article
Information
Parasitology , Volume 94 , Issue 1 , February 1987 , pp. 49 - 54
Copyright
Copyright © Cambridge University Press 1987

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