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The inheritance of responses to schistosomiasis mansoni in two pairs of inbred strains of mice

Published online by Cambridge University Press:  06 April 2009

Janet T. Jones  and
J. R. Kusel
Janet T. Jones
Affiliation:
Department of Biochemistry, University of Glasgow, Glasgow G12 8QQ
J. R. Kusel
Affiliation:
Department of Biochemistry, University of Glasgow, Glasgow G12 8QQ
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Extract

Genetic differences in mice influence both the pathological and immunological responses to schistosomiasis mansoni. We have investigated the nature of the genetic factors influencing these responses by crossing two different pairs of strains of mice which vary in their response to infection, and measuring responses in the F1 hybrid and backcross offspring. The two pairs of parental strains differed with respect to faecal egg excretion, accumulation of eggs in the tissues, splenomegaly and pattern of antibody response. The numbers of adult worms which establish do not differ between strains. The inheritance of the responses measured was different in the two pairs of strains. The F1 hybrid from the C57BL/6/Ol/a /c cross resembled the low-responding parental strain (CBA/Ca) with respect to faecal egg excretion, accumulation of eggs in the tissues and splenomegaly, and was intermediate in its pattern of antibody response. The F1 hybrid mice from the NIH /Ca cross resembled the high-responding strain (CBA/Ca) with respect to faecal egg excretion, accumulation of eggs in the tissues and splenomegaly, and had an earlier and greater antibody response than either parental strain. No evidence of single gene influence on any of these responses was seen in the backcross offspring. The differing patterns of inheritance and the absence of a bimodal distribution of responses in the backcross offspring indicate that each of these responses is influenced by multiple genes. The pattern of antibody response did not correlate between strains with any of the pathological res The positive correlation of egg accumulation in the tissues and faecal egg excretion suggests that there are genetic influences on the fecundity of the worms.

Type
Research Article
Information
Parasitology , Volume 90 , Issue 2 , April 1985 , pp. 289 - 300
Copyright
Copyright © Cambridge University Press 1985

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