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Regulation of toxocariasis in mice selectively reared for high and low immune responses to Nematospiroides dubius

Published online by Cambridge University Press:  18 November 2009

P. J. Brindley
Affiliation:
Department of Parasitology, University of Queensland, St. Lucia 4067, Australia
Paul Prociv
Affiliation:
Department of Parasitology, University of Queensland, St. Lucia 4067, Australia
Catherine A. Creevey
Affiliation:
Department of Parasitology, University of Queensland, St. Lucia 4067, Australia
I. J. East
Affiliation:
Department of Parasitology, University of Queensland, St. Lucia 4067, Australia Long Pocket Laboratories, C.S.I.R.O. Division of Tropical Animal Science, Private Mail flag No. 3, Indooroopilly 4068, Australia

Abstract

Test mice have been selectively reared for high (H) or low (L) immune responses to Nematospiroides dubius. After secondary infection with N. dubius, the L mice voided ten times as many eggs in their faeces as the II mice, and at necropsy, 71% versus 20% of the inoculum of N. dubius were recovered as adult worms from the L and II mice respectively. Furthermore, N. dubius were more fecund in the L than in H mice. High or low immune responsiveness was not restricted to N. dubius infection in these mice but was also observed during Toxocara canis infection. The migration of T canis larvae from gut via the liver to skeletal muscle and CNS was inhibited in H versus L mice. Many more larvae were recovered from the livers of II compared with L mice which was indicative of greater immunity in the H mice. The protective immune response in H compared with L mice to both N. dubius and T canis included pronounced cosinophilia and elevated antiparasite antibody titres.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1985

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