Eimeria acervulina: The influence of inoculation dose on transmission between broiler chickens

F.C. Velkers, A. Bouma, E.A.M. Graat, D. Klinkenberg, J.A. Stegeman, M.C.M. de Jong

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

The course and clinical appearance of an Eimeria species infection in chicken flocks depend on the response of an individual bird to infection and on population-dynamics of the infection in the flock. Differences in ingested numbers of oocysts may affect oocyst load in the flock and the subsequent infectious dose for not yet infected birds. To study the link between numbers of oocysts excreted by infected birds and transmission of Eimeria acervulina, experiments were carried out with 42 pairs of broiler chickens using inoculation doses with 5, 50, 500 or 50,000 sporulated oocysts. In each pair one bird was inoculated and the other bird was contact-exposed. All contact birds became infected, which occurred on average within 34 h after exposure to an inoculated bird. Although a higher inoculation dose resulted in higher oocyst excretion in inoculated and contact-infected birds, only small non-significant differences in transmission rates between groups were found
Original languageEnglish
Pages (from-to)286-296
JournalExperimental Parasitology
Volume125
Issue number3
DOIs
Publication statusPublished - 2010

Keywords

  • avian coccidiosis
  • vaccination strategies
  • dynamics
  • immunity
  • maxima
  • level
  • model
  • resistance
  • infection
  • tenella

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