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Tick-Borne Fever in Lambs of Different Ages

Acta Veterinaria Scandinavica volume 34, pages 45–52 (1993)Cite this article

Abstract

Four groups of lambs aged 1 week, 4 weeks, 1/2 year and 1 year old respectively were inoculated with Ehrlichia phagocytophila infected blood. Clinical signs, temperature reactions, haematological changes and parasitaemia were more moderate in lambs inoculated with E. phagocytophila at the age of 1 week than those recorded in the older animals. The clinical response to tick-borne fever (TBF) appears to be more severe with increasing age of the lambs. The lymphocyte reactivity to mitogens was reduced in the TBF infected lambs, and was most pronounced in lambs in the 3 older age groups.

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Acknowledgment

The study was supported by a grant from the Agricultural Research Council of Norway. The author thanks Dr. Charles Press for linguistic correction of the manuscript.

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  1. State Veterinary Research Station for Small Ruminants, Sandnes, Norway

    S. Stuen

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  1. S. Stuen
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Stuen, S. Tick-Borne Fever in Lambs of Different Ages. Acta Vet Scand 34, 45–52 (1993). https://doi.org/10.1186/BF03548222

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  • DOI: https://doi.org/10.1186/BF03548222

Keywords

  • ehrlichia
  • sheep
  • lymphocyte transformation

Acta Veterinaria Scandinavica

ISSN: 1751-0147