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Heligmosomoides polygyrus and Trypanosoma congolense infections in mice: a laboratory model for concurrent gastrointestinal nematode and trypanosome infections

Published online by Cambridge University Press:  06 April 2009

B. B. Fakae
Affiliation:
Centre for Tropical Veterinary Medicine, Easter Bush, Roslin, Midlothian EH25 9RG, UK
L. J. S. Harrison
Affiliation:
Centre for Tropical Veterinary Medicine, Easter Bush, Roslin, Midlothian EH25 9RG, UK
C. A. Ross
Affiliation:
Centre for Tropical Veterinary Medicine, Easter Bush, Roslin, Midlothian EH25 9RG, UK
M. M. H. Sewell
Affiliation:
Centre for Tropical Veterinary Medicine, Easter Bush, Roslin, Midlothian EH25 9RG, UK

Summary

A murine model using Heligmosomoides polygyrus and Trypanosoma congolense has been developed for studying the effects of concurrent chronic gastrointestinal nematode and trypanosome infections. Female outbred mice were infected either with 500 infective larvae (L3) of H. polygyrus or with 104 bloodstream forms of T congolense or both. In concurrent infections, animals were dosed with both parasites simultaneously or the trypanosomes were injected 5 or 10 days after the mice were infected with the nematode. The course of infection was monitored by routine parasitological and immunological techniques for 30 days after the H. polygyrus infection. Concurrently infected mice were severely compromised, except when T. congolense was superimposed on a 10-day-old (adult) H. polygyrus infection. In H. polygyrus-infected mice, simultaneous or subsequent infection with trypanosomes did not markedly influence worm establishment or fecundity, but the female worms were slightly stunted. Surviving mice displayed a markedly reduced antibody response to H. polygyrus antigens and a slightly reduced antibody response to T. congolense antigens.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1994

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