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Poultry Biosecurity: Principles, Disease Prevention and Management
Biosecurity, which literally means the safety of living things, is a program designed to prevent the exposure of birds to disease-causing organisms by reducing the introduction and spread of pathogens into and between farms. Biosecurity, in a broader sense, encompasses isolation, traffic control, sanitation, vaccination, serological monitoring of diseases, air quality, etc., which help prevent the entry and control the spread of pathogens in and around the farm.
Biosecurity is the cheapest and, at the same time, the most effective means of disease control available; without it, no disease prevention program will work well. Biosecurity is a defensive health plan and hygienic procedure that can help keep your farm disease-free. Biosecurity is therefore an integral part of farm operations.
As poultry operations become more and more efficient, however, they also become a threat to themselves and their neighbors because of the concentration of more birds in a limited space. Poultry farmers should take time to eliminate as many disease-causing organisms as possible. Therefore, it is better to wait a little longer before introducing a new flock than to hurry and risk infection of the new flock.
The most effective form of protection against disease, especially for poultry under modern production techniques, is biosecurity, i.e., excluding disease from the farm environment, and this holds the key to successful and profitable farming.
Biosecurity, medication/vaccination, and good farm management are three sides of the disease control triangle. Poultry must be provided with an environment in which disease and infection are controlled to the point where vaccination and medication achieve beneficial effects. Biosecurity is the key element in the triangle of disease control.
Conceptual Biosecurity
- It is best to build a farm in an isolated area at least 3 km away from the nearest poultry operation in the case of breeder farms and 1.6 km in the case of commercial layer and broiler farms.
- In the case of breeder farms, the farm should be away from major roads that may be used to transport commercial and backyard poultry.
- Maintain enough distance between breeder and grow-out farms and facilities such as hatcheries and feed mills.
Structural Biosecurity
- Fencing of the farm perimeter to prevent unwanted visitors.
- Test the water source for minerals, bacteria, chemical contamination, and pathogen load.
- Concrete pad with suitable water and power supply for sanitation of vehicles.
- Suitable location for storage of bagged feed.
- All-weather roads within the farm to facilitate cleaning and prevent the spread of microbes by vehicles and footwear.
- Facilities for the safe and scientific disposal of dead birds.
- Safe housing with suitable wild bird and rodent proofing.
- Feed, litter, and equipment should be stored in a section separated from the live bird area to prevent contamination.
- A 3-meter boundary of land around the building must be kept free of all vegetation to prevent rodent and wildlife activity.
Operational Biosecurity
- Operation manuals should be developed for day-to-day activities carried out in feed mills, hatcheries, breeding, and grow-out facilities, incorporating emergency plans.
- Proper decontamination and disinfection of equipment, houses, etc., should be performed following depletion of the flock.
- In breeder farms, all visitors and workers are required to shower and use clean farm clothing to prevent cross-contamination between them.
- Maintain records of visitors and their purpose.
- In the case of breeder farms, no vehicles or equipment should be allowed within the farm area from the time of flock placement until disposal.
- In commercial broiler units, a minimum interflock interval of two weeks is recommended.
- Use an effective integrated pest management program to control pests and rodents through biological, chemical, and mechanical means.
- An appropriate program for disease diagnosis and a proper vaccination schedule should be implemented.
- In small-scale egg production units, follow an all-in/all-out system. If this is not possible, pullets should be obtained from a source free of vertically transmitted diseases.
- Recycled egg-packing materials, etc., should be decontaminated at the point of entry to the farm.
- Routine disease monitoring procedures, such as postmortem examination and periodic serum antibody assays, should be conducted to determine the immune status of the flock.
- Regular culling of unhealthy, unproductive, and diseased birds.
