High Path Avian Influenza (HPAI) Emergency Poultry Disease Planning (EPDP) Meeting October 1, 2015

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USDA HPAI Epidemiology Studies Goal: Identify transmission pathways Conclusion: Not enough evidence to point to a specific pathway(s) for current spread RNA analyses suggests: – Independent introductions – Transmission between farms – Both occurring simultaneously in several states

Potential Risk Factors Sharing equipment between farms – Trucks, turkey loaders, egg racks, pallets, flats Small wild birds entering houses Rendering of dead birds – Rendering truck coming near poultry house Garbage trucks on farm near house Lack of biosecurity audits

Potential Risk Factors Proximity to other affected farms Airborne transmission??? – Genetic material detected in air samples inside and outside of infected houses – Airborne exposure not statistically significant – USDA could thus not determine if responsible – Other factors of being in proximity could be cause

Protective Factors Farm > 100 miles from egg processing plant Farm > 100 yards from public gravel/dirt road Farm had wash stations for vehicles Poultry house had hard surface entry pads – Routinely cleaned and disinfected Visitors changed or used protective clothing Dead bird disposal > 30 yards from the house

Biosecurity Self-Assessment Checklist Goal: Each farm site-specific biosecurity plan USDA and industry developed – Biosecurity Self-Assessment Checklist (12 areas) – Educational materials Future Steps: – Indemnity could be linked to a plan – Audit of plan by NPIP or other program Concluded not enough evidence to point to a specific pathway(s) for the current spread Genetic analyses suggest independent introductions as well as transmission between farms were occurring in several States at the same time

Biosecurity Self-Assessment Checklist Biosecurity Officer – Designs and implements the plan Training of Employees and Other Personnel – Specific Biosecurity SOPs Personnel changing of footwear/clothing Perimeter Buffer Area (PBA) Line of Separation (LOS)

Perimeter Buffer Area (PBA)

Line of Separation (LOS) – Danish Entry System

Biosecurity Self-Assessment Checklist Prevent Exposure and Contamination – Pre-movement testing of replacement poultry – Proper equipment sanitizing and limit sharing – Wild bird, rodent and insect control program – Treatment of water supplies – Prompt and bio-secure dead bird disposal – Isolate manure/litter removal procedures – Keeping clean feed and replacement litter