Inter-batch poultry shed sanitation

Inter-batch sanitation is the structured cleaning and disinfection cycle carried out between successive broiler or layer batches to break disease carry-over inside a poultry shed. It is the single most cost-effective biosecurity intervention on a commercial farm and is mandated by Department of Animal Husbandry and Dairying (DAHD) biosecurity standard operating procedures, with parallel guidance in the WOAH (formerly OIE) Terrestrial Animal Health Code.

Principle

A poultry house leaves each batch contaminated with feathers, dust, manure and microbial loads that include Newcastle disease virus (Ranikhet Newcastle Disease), infectious bronchitis, Salmonella, E. coli and coccidial oocysts. Sequential physical removal, chemical disinfection and a vacant downtime collectively reduce the pathogen load to a level that incoming chicks can tolerate.

Implementation

The standard cycle proceeds in stages: removal of birds, litter and movable equipment; dry brushing and sweeping; high-pressure washing with detergent and water; application of caustic soda or bleaching powder solution to floors and lower walls; lime or whitewash on side walls; fumigation of the dry shed (commonly with potassium permanganate plus formaldehyde or commercial replacements); and a vacant downtime of 10-14 days before restocking. Footbaths at entry, vehicle disinfection at the farm gate and visitor restrictions complete the biosecurity envelope.

Adoption context

Integrated broiler companies that operate contract grow-out farms (Contract Broiler Farming) enforce sanitation between batches as a condition of bird placement, since carry-over losses fall on the integrator. Standalone smallholders often shorten downtime under economic pressure, increasing chick mortality (Poultry Mortality Management).

Limitations

The cycle is labour-intensive and consumes 10-14 days of revenue per house. Caustic soda and formalin are hazardous to handle, and improper rinsing can irritate young chicks during brooding (Brooding Chicks). Open-sided sheds (Open Poultry Shed) cannot be sealed for fumigation as effectively as environmentally controlled houses, so chemical contact time and litter management gain weight in such systems.

References

Environmental Management in the Broiler House. Aviagen.