High Path Avian Influenza HPAI Emergency Poultry Disease

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

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