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The pattern of peripheral blood leucocyte changes in mice infected with Nematospiroides dubius

Published online by Cambridge University Press:  18 November 2009

Najah M. H. Ali
Affiliation:
Experimental Parasltology Unit, Department of Zoology, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Jerzy M. Behnke
Affiliation:
Beecham Pharmaceuticals, Animal Health Research Centre, Walton Oakes, Dorking Road, Tadworth, Surrey KT20 7NT, UK
B. R. Manger
Affiliation:
Beecham Pharmaceuticals, Animal Health Research Centre, Walton Oakes, Dorking Road, Tadworth, Surrey KT20 7NT, UK

Extract

Experiments were carried out to define the haematological changes taking place during the first six weeks of a primary infection with Nematospiroides dubius. The general pattern of changes was observed to comprise a rapid increase in circulating leucocytes (4 to 5-fold increase) which consisted of a neutropl a, lymphocytosis, monocytosis and an eosinophilia. However, in strong responder NIH mice leucocyte counts returned to normal more rapidly than in other strains (by day 28). In contrast, in weak responder C57BL/10 mice the leucocyte counts whilst falling significantly relative to day 7 did not return to normal within the experimental period. Mice infected with irradiated larvae did not experience as high a leucocytosis as did mice given an identical number of normal larvae. The peak lymphocytosis, neutrophilia and monocytosis were all lower. The removal of adult worms from infected animals by treatment with pyrantel on days 9,11,13 and 16, also significantly altered the pattern of leucocytosis. The neutrophilia which was evident on day 7 returned rapidly to normal, whereas in mice which had retained their worms a peak neutrophilia was observed on day 14. These haematological changes were discussed and related to the failure of hostprotective immunity to operate effectively during the early stages of a primary infection with N. dubius.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 1985

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