Poultry Biosecurity PREPARING FOR FALL AI THREAT

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Barbara Richardson
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1 Lesson Learned from Spring AI Outbreak Epidemiology & Preparation of Fall migration Poultry Biosecurity PREPARING FOR FALL AI THREAT Dr. Mueez Ahmad DVM MS Lindsay Burg Matt Mayer

2 Topics Epidemiology of Spring AI outbreak Lesson Learned? Preparing for Fall Migration Biosecurity an ultimate tool

3 Epidemiology: Avian Influenza Virus

4 Understanding Avian Influenza Virus Influenza Virus Type: A, B, C, Influenza Type A: Human, Swine, Avian Avian Influenza Subtypes: H(1~16) N(1~9) Avian Influenza Pathotype: LPAI, HPAI Strains: Asian, European, North American, Mixed, Antigenic Drift & Shift

5 Avian Influenza Strains in USA High Path AI Wild, Captive, Domestic & Commercial Birds H5N2 (Mixed Origin H5 Asia & N2 North America) H5N8 (Asian Origin, Mixed Origin) H5N1 (New NA strain not related to Asia & Europe

6 AI Outbreak is a World Problem

7 Avian Influenza Epidemiology FALL SEASONAL WB MIGRATION SPRING

8 Avian Influenza Transmission

9 Avian Influenza Transmission Biosecurity Eradication

Impact of 2015 AI Outbreak 223 cases 48,091,293 birds affected http://www.aphis.usda.

10 Impact of 2015 AI Outbreak 223 cases 48,091,293 birds affected urfocus/animalhealth/sa_animal_disease_infor mation/sa_avian_health/ct_avian_influenza_di sease/!

11 Lesson Learned from Spring AI Outbreak 1. H5N2 and H5N8 virus was major cause of AI outbreak in US Poultry 2. CDC considered the risk to people influenza was low 3. US industry may consider H5Nx vaccine 4. Disease Spread by independent as well as common source of virus. 5. Industry Current Biosecurity measures were unable to contain independent infection. 6. Eradication & heighten biosecurity finally stop the outbreak by June 17 th Are we prepared for Fall WB Migration?

12 Epidemiology Example Farm A Day 1 Farm B Day 2 Farm C Day 2

13 Virus Aerosolization Air samples positive up to 1000 m from house Up to 63% of dust tested AI positive 50% of air samples tested positive/ suspect

14 AI Prevention A Strong Biosecurity Program

15 Traditional Approach Entire Farm as a Unit

16 New Approach Consider a farm plan and each individual house plan

17 New Approach Consider a farm plan and each individual house plan

18 New Approach Consider a farm plan and each individual house plan

19 New Approach Consider a farm plan and each individual house plan

20 New Approach Consider a farm plan and each individual house plan

21 Traditional Approach Biosecurity signs Perimeter fencing with locked gate No unauthorized visitors 1) Time away from other birds 2) Visitor log 3) Proper PPE Wheel wash/vehicle disinfection Boot baths

NCC Biosecurity Principles Limiting visitors on the farm and minimizing foot traffic; Avoiding contact with wild and domestic

Ensuring that all visitors or personnel have disinfected or new footwear before entering a house or facility; Making sure

signage clearly stating the farm is a biosecure zone and any unauthorized entry is strictly prohibited; Employing effective

22 NCC Biosecurity Principles Limiting visitors on the farm and minimizing foot traffic; Avoiding contact with wild and domestic fowl; Avoiding the sharing of farm equipment; Having a clean and functioning footbath at each entrance to the broiler house; Ensuring that all visitors or personnel have disinfected or new footwear before entering a house or facility; Making sure feed and water sources are covered and free of contaminants, limiting the attraction of wild fowl and pests; Having official signage clearly stating the farm is a biosecure zone and any unauthorized entry is strictly prohibited; Employing effective pest and wild bird management practices; Adequately training farmers, farm and company personal in biosecurity and disease prevention.

23 New Approach For each house 1) Dirty Zone/Clean Zone

24 Biosecurity Step For Each Entrance 1. Boot dips at every entrance, properly managed 1. Virkon S (1%) or DC&R (1 oz/gal) 2. Boots for each barn, stored in clean zone when not in use

25 Vector Control Farm primes & each house 1. Pest Management 1. Rodenticide baiting program 2. Insecticide program

26 Barn Sanitation C&D 1) Cleaning is most important 2) Cleaning steps: a) Dry clean b) Pre-Soak/Wet clean i. BioSentry Chlor-a Foam ii. c) Rinse d) Dry 3) Disinfect ion BioSentry Acid-A-Foam for mineral deposits 1) Virkon Spray 2) Thermal Fog y-prevention-is-better-than-cure/

27 Poultry Drinking Water Water Sanitation & Disinfection is Critical

28 Disease Outbreak AI Response Plan 1) National 2) Regional 3) Company 4) Individual Plans need to include provisions for depopulation and disposal

29 Depopulation & Disposal

30 Biosecurity Culture

31 Thank You Questions?

Surviving an HPAI Outbreak

Surviving an HPAI Outbreak Lessons Learned VIV Poultry & Egg Summit Latin America, October 2016 Travis Schaal, DVM Avian Influenza Secreted in birds feces and nasal discharges Virus survives for days