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Zoonotic disease
Salmonellosis in sheep
  1. Amanda Carson and
  2. Rob Davies
  1. APHA Penrith, Merrythought, Calthwaite, Penrith, Cumbria CA11 9RR
  2. APHA Weybridge, Woodham Lane, New Haw, Addlestone, Surrey KT15 3NB
  1. e-mail: amanda.carson{at}

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The APHA has a responsibility under the Zoonoses Order (ZO) 1989 for laboratory testing, reporting and investigation of Salmonella incidents. The APHA are currently investigating incidents of Salmonella in sheep with the same strain of Salmonella as in an on-going human outbreak.

Scanning surveillance activities in 2017 identified a potential new strain of Salmonella Typhimurium following postmortem examination of sheep in a flock where a high level of mortality had occurred – 207 sheep had died over one month from a group of 512 sheep. In 2018, a second incident was identified by the APHA with the same S Typhimurium strain and clinical signs in sheep included depression, diarrhoea and death.

This new strain of S Typhimurium is different to previous outbreak strains in the …

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