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Anaemia and mortality in calves infested with the long-nosed sucking louse (Linognathus vituli)
  1. A. Otter, MA, VetMB, PhD, MRCVS1,
  2. D. F. Twomey, MVB, MRCVS2,
  3. T. R. Crawshaw, BVetMed, MRCVS2 and
  4. P. Bates, PhD, MIBiol, CBiol, FRES3
  1. 1 Veterinary Laboratories Agency, Kendal Road, Harlescott, Shrewsbury SYI 4HD
  2. 2 Veterinary Laboratories Agency, Staplake Mount, Starcross, Exeter EX6 8PE
  3. 3 Veterinary Laboratories Agency, Woodham Lane, New Haw, Addlestone KT15 3NB


Young calves which died on three dairy farms in England and Wales had generalised pallor and heavy infestations of the long-nosed sucking louse, Linognathus vituli. Surviving calves had packed-cell volumes, haemoglobin concentrations and red blood cell counts below the reference ranges, consistent with anaemia, and they were also heavily infested with lice. No other causes of anaemia were identified. It is proposed that heavy infestations with L vituli should be considered when investigating the cause of anaemia in calves.

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