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Risk factors for gastric ulcers in Australian pigs at slaughter
I D Robertson1, J M Accioly, K M Moore
1Division of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, WA 6150, Perth, Australia. robbo@numbat.murdoch.edu.au
Preventive Veterinary Medicine
|April 9, 2002
Summary
Oesophago-gastric ulcers (OGUs) affected 30% of pigs studied. Factors like pelleted feed, ad libitum feeding, and dam water sources significantly increased OGU risk in pig herds.
Area of Science:
- Veterinary Pathology
- Animal Husbandry
- Swine Health
Background:
- Oesophago-gastric ulcers (OGUs) are a significant concern in commercial pig production.
- Prevalence and risk factors for OGUs vary geographically and by production system.
Purpose of the Study:
- To determine the prevalence of OGUs in Australian pigs.
- To identify herd-level and pig-level risk factors associated with OGU prevalence.
Main Methods:
- Examination of 15,741 pig stomachs from 136 herds across four Australian states.
- Questionnaire survey of piggery owners to gather data on management practices.
- Random effects logistic-regression analysis to assess risk factors.
Main Results:
- Overall OGU prevalence was 30%, with significant regional variation (Victoria: 53%, WA: 30%, QLD: 7%).
- Culled breeding animals had a higher OGU prevalence than younger pigs.
- Key risk factors included ad libitum feeding (OR=13.7), automated feeding systems (OR=7.8), pelleted rations (OR=384), and dam water sources (OR=3.8).
- Each ration formulation change for finisher pigs increased OGU risk by 1.5 times.
Conclusions:
- OGU prevalence is substantial in Australian piggeries, with notable regional differences.
- Specific feeding strategies (pelleted feed, ad libitum, automated systems) and water sources are strongly associated with increased OGU risk.
- Management of feeding systems and water supply are critical for mitigating OGU in swine.
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