Parasitology Research

, Volume 83, Issue 7, pp 727–730 | Cite as

Reduced egg counts in mixed infections with Oestrus ovis and Haemonchus contortus : influence of eosinophils?

  • P. Dorchies
  • J. P. Bergeaud
  • N. Van Khanh
  • S. Morand
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Abstract

In all, 2 groups of lambs were infected either with Oestrus ovis first-instar larvae or with 10,000 third-stage larvae (L3) of Haemonchus contortus. Another group of lambs was infected with both parasites. Fecal nematode egg counts, plasma pepsinogen concentrations, specific O. ovis enzyme-linked immunosorbent assay (ELISA) antibodies, and blood eosinophil counts were monitored and compared to with the values recorded for a control group of uninfected lambs. There was no significant difference between the burden of H. contortus found in mixed and single infections. However, the nematode egg production was significantly depressed in mixed infections. O. ovis affects the population of H. contortus at least by decreasing the parasite egg output. This effect may be mediated through the increase in eosinophil production stimulated by the presence of O. ovis.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • P. Dorchies
    • 1
  • J. P. Bergeaud
    • 1
  • N. Van Khanh
    • 1
  • S. Morand
    • 2
  1. 1.Laboratoire associé INRA Physiopathologie respiratoire des ruminants, Ecole Nationale Vétérinaire, 23, Chemin des Capelles, F-31076 Toulouse Cédex, FranceFR
  2. 2.Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, UMR CNRS 5555, Université de Perpignan, Avenue de Villeneuve, F-66860 Perpignan Cédex, France Fax: +33 (0)4 68 66 22 81; e-mail: morand@univ-perp.frFR

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