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Immunity to adult Heligmosomoides polygyrus (Nematospiroides dubius): survival or rejection of adult worms following transplantation to mice refractory to larval challenge

Published online by Cambridge University Press:  05 June 2009

M. Robinson
Affiliation:
MRC Experimental Parasitology Research Group, Department of Zoology, University of Nottingham, University Park, Nottingham, NG7 2RD, England
J. M. Behnke*
Affiliation:
MRC Experimental Parasitology Research Group, Department of Zoology, University of Nottingham, University Park, Nottingham, NG7 2RD, England
D.J.L. Williams
Affiliation:
MRC Experimental Parasitology Research Group, Department of Zoology, University of Nottingham, University Park, Nottingham, NG7 2RD, England
*
2Author to whom all correspondence should be addressed.

Abstract

Experiments were carried out to explore the survival of 14-day adult H. polygyrus following transplantation to mice of four strains, immunized by various protocols. Adult worm establishment and survival was unimpaired in CFLP mice which were totally refractory to larval challenge. Transplanted adult worms were also successful in NIH mice immunized by the 9-day abbreviated infection regime. However, NIH mice exposed to irradiated larvae or subjected to the divided primary infection, expelled transplanted adults. The 9-day abbreviated infection was further examined in SJL and (C57 Bl10 X NIH) F1 mice which expel adult worms during a primary infection and although this regime was unsuccessful in causing NIH mice to reject adult worms, expulsion of adult worms was accelerated in SJL and F1 mice. The survival of adult H. polygyrus was discussed in the context of stage-specific immunity and the delicate balance between the immunogenic stimuli from developing larvae, the immunomodulatory activities of adult stages and the host's genetically determined capacity to respond to these opposing signals.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 1988

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