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The relative importance of host characteristics and co-infection in generating variation in Heligmosomoides polygyrus fecundity

Luong, L. T., Perkins, Sarah E., Grear, D. A., Rizzoli, A. and Hudson, P. 2010. The relative importance of host characteristics and co-infection in generating variation in Heligmosomoides polygyrus fecundity. Parasitology 137 (6) , pp. 1003-1012. 10.1017/S0031182009991892

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Abstract

We examined the relative importance of intrinsic host factors and microparasite co-infection in generating variation in Heligmosomoides polygyrus fecundity, a parameter that serves as a proxy for infectiousness. We undertook extensive trapping of Apodemus flavicollis, the yellow-necked mouse in the woodlands of the Italian Alps and recorded eggs in utero from the dominant nematode species H. polygyrus, and tested for the presence of five microparasite infections. The results showed that sex and breeding status interact, such that males in breeding condition harboured more fecund nematodes than other hosts; in particular, worms from breeding males had, on average, 52% more eggs in utero than worms from non-breeding males. In contrast, we found a weak relationship between intensity and body mass, and no relationship between intensity and sex or intensity and breeding condition. We did not find any evidence to support the hypothesis that co-infection with microparasites contributed to variation in worm fecundity in this system. The age-intensity profiles for mice singly-infected with H. polygyrus and those co-infected with the nematode and at least one microparasite were both convex and not statistically different from each other. We concluded that intrinsic differences between hosts, specifically with regard to sex and breeding condition, contribute relatively more to the variation in worm fecundity than parasite co-infection status.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > Q Science (General)
Uncontrolled Keywords: super-shedders; male-biased transmission; Heligmosomoides polygyrus; Apodemus; parasite community; co-infection
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0031-1820/ (accessed 24/02/2014).
Publisher: Cambridge University Press
ISSN: 0031-1820
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 03:29
URI: http://orca.cf.ac.uk/id/eprint/22056

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