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Tickborne diseases
Intercurrent tickborne fever infection and Bibersteinia trehalosi septicaemia in a five-week-old lamb
  1. Roger Daniel1,
  2. Kate Pugh2,
  3. Nick Torrens3,
  4. Amanda Carson3 and
  5. Mark Wessels4
  1. 1Wales Veterinary Science Centre, Y Buarth, Aberystwyth SY23 1ND
  2. 2Milfeddygion Dolgellau, Bala Road, Dolgellau LL40 2YF
  3. 3APHA – Penrith, Merrythought, Penrith CA11 9RR
  4. 4Finn Pathologists, One Eyed Lane, Weybread, Diss, Norfolk IP21 5TT

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WE wish to report the findings of a postmortem examination carried out by the Wales Veterinary Science Centre (WVSC) at Aberystwyth. Lamb deaths began to occur, at a rate of one per day over a two-week period, in a 300-ewe flock grazing mountain pasture. A postmortem examination carried out at the local veterinary practice revealed a focal 3 cm diameter swelling on the spleen, and a lymphadenopathy affecting particularly the mesenteric lymph nodes. A test for clostridial toxins in small intestinal contents gave a negative result. A second lamb was then submitted to the WVSC.

This was a well grown, five-week-old Welsh mountain lamb, which was found dead with no prior clinical signs. Postmortem …

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