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Related Experiment Videos

Contagious ecthyma in the live sheep export industry

A R Higgs1, R T Norris, F C Baldock

  • 1Animal Industries Division, Department of Agriculture, Albany, Western Australia.

Australian Veterinary Journal
|September 1, 1996
PubMed
Summary

Vaccinating sheep against contagious ecthyma (scabby mouth) before live export can reduce disease prevalence. However, current methods cannot guarantee disease-free shipments to the Middle East.

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Area of Science:

  • Veterinary Science
  • Animal Health
  • Epidemiology

Background:

  • Contagious ecthyma (scabby mouth) poses a significant health risk to sheep during live export.
  • Understanding disease prevalence and control is crucial for the Australian sheep export industry.

Purpose of the Study:

  • To evaluate control strategies for contagious ecthyma in Australian sheep destined for live export.
  • To assess the effectiveness of vaccination in reducing scabby mouth prevalence.

Main Methods:

  • Conducted prevalence studies on 106 farms and at a commercial feedlot in Western Australia.
  • Performed vaccination trials on sheep across 26 farms in 3 states.
  • Utilized a compartmental model to identify key determinants of disease prevalence.

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Main Results:

  • Contagious ecthyma was present on 23.6% of farms with weaner sheep, with an average prevalence of 6.1%.
  • Vaccinated sheep exhibited lower scabby mouth prevalence post-simulated shipping compared to controls.
  • The proportion of immune sheep was identified as the primary factor influencing disease prevalence.

Conclusions:

  • Vaccination programs can effectively mitigate contagious ecthyma during live sheep export.
  • Achieving completely scabby mouth-free shipments remains a challenge with current export technologies.