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Eosinophilia in Kenyan baboons (Papio anubis) induced by Trichinella spiralis and Schistosoma mansoni

Published online by Cambridge University Press:  06 April 2009

R. F. Sturrock
Affiliation:
Wellcome Trust Research Labotatories, P.O. Box 43640, Nairobi, Kenya and The World Health Organization Research and Training Centre, Nairobi, Kenya.
A. E. Butterworth
Affiliation:
Wellcome Trust Research Labotatories, P.O. Box 43640, Nairobi, Kenya and The World Health Organization Research and Training Centre, Nairobi, Kenya.
S. D. Karamsadkar
Affiliation:
Wellcome Trust Research Labotatories, P.O. Box 43640, Nairobi, Kenya and The World Health Organization Research and Training Centre, Nairobi, Kenya.
R. Kimani
Affiliation:
Wellcome Trust Research Labotatories, P.O. Box 43640, Nairobi, Kenya and The World Health Organization Research and Training Centre, Nairobi, Kenya.
M. Imbuga
Affiliation:
Wellcome Trust Research Labotatories, P.O. Box 43640, Nairobi, Kenya and The World Health Organization Research and Training Centre, Nairobi, Kenya.
V. Houba
Affiliation:
Wellcome Trust Research Labotatories, P.O. Box 43640, Nairobi, Kenya and The World Health Organization Research and Training Centre, Nairobi, Kenya.

Extract

High primary doses of Trichinella spiralis administered orally to Kenyan baboons (Papio anubis) induced a marked but unpredictable eosinophilia which started 2–3 weeks after infection and persisted as erratic waves for at least 6 months. Low primary oral doses induced no eosinophilia but a later, high challenge gave an accelerated eosino-philic response, although the peak was lower than in high primary infection. Intravenous injection of infective T. spiralis larvae resulted in a predictable, rapid eosinophilic response which persisted for several weeks. Intravenous injection of a particulate material, Sepharose, gave no oesinophilic response.

Percutaneous Schistosoma mansoni infection of baboons resulted in a two-stage eosinophilic response: an initial rise occurred about ⅔ of the way through the pre-patent period and was followed by a second rise at the onset of patency. After peaking, the eosinophilia waned erratically over the next 3 or 4 weeks.

A strong antibody response, measured by countercurrent imnruno-electrophoresis, was given in oral infections with T. spiralis, but intravenous injections elicited little or no antibody formation. Parasitological evidence indicated no cross-resistance to S. mansoni in baboons injected with T. spiralis 9 days previously. Thus, the intravenous injection of infective T. spiralis larvae appears to be a suitable method of inducing experimentally a non-specific eosinophilia to investigate possible immune mechanisms to S. mansoni in the baboon.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1977

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