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Production of Germ-Free Fast-Growing Broilers from a Commercial Line for Microbiota Studies
Published on: June 18, 2020
A contact dermatitis of broilers--epidemiological findings.
S G McIlroy1, E A Goodall, C H McMurray
1Department of Agriculture for Northern Ireland, Veterinary Research Laboratories, Stormont, Belfast, Northern Ireland.
Avian Pathology : Journal of the W.V.P.A
|January 1, 1987
Summary
Contact dermatitis in broiler chickens significantly impacts carcass quality. Key production factors like stocking density, feed, bird age, sex, and poor litter conditions influence incidence, particularly during winter with high humidity.
Area of Science:
- Poultry Science
- Veterinary Epidemiology
- Animal Husbandry
Background:
- Contact dermatitis causes significant broiler carcass downgrading in Northern Ireland.
- Understanding epidemiological factors is crucial for mitigating economic losses in the poultry industry.
Purpose of the Study:
- To identify and quantify key epidemiological factors influencing contact dermatitis incidence in broiler flocks.
- To analyze the impact of production variables on the occurrence of skin lesions.
Main Methods:
- A longitudinal survey analyzed data from 986 broiler flocks (12.6 million birds) over two years.
- Statistical analysis quantified the effects of stocking density, feed, bird age, sex, season, and environmental conditions.
Main Results:
- Stocking density, feed manufacturer, bird age at removal, and sex significantly affected lesion occurrence.
- Higher incidence was observed in winter, correlated with increased relative humidity.
- Poor litter conditions were strongly associated with increased contact dermatitis.
Conclusions:
- Production management practices, including stocking density, feed, and litter quality, are critical in controlling contact dermatitis.
- Environmental factors like season and humidity play a role, necessitating targeted interventions.
- Variations between producers and houses highlight the importance of specific farm-level management strategies.
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