AVT session 2: Depopulation Strategies

download AVT session 2: Depopulation Strategies

If you can't read please download the document

  • date post

    20-Jan-2015
  • Category

    Education

  • view

    378
  • download

    1

Embed Size (px)

description

This second presentation of a series of 6 AVT presentation on Emergency Response to outbreaks of Avian Influenza focuses on depopulation strategies, rapid response management, culling, storage, transportation, composting and disposal of carcasses.

Transcript of AVT session 2: Depopulation Strategies

  • 1. Harm Kiezebrink Research Fellow Faculty of Veterinary Science Queensland University
  • 2. Depopulation Rapid response management Culling Storage Transportation Composting Disposal 2 2014 Applied Veterinary Technologies Europe AB
  • 3. Incident Command System Structure 3 2014 Applied Veterinary Technologies Europe AB
  • 4. Incident Command System Clear management structure Veterinary officer, responsible for veterinary tasks, including diagnose & sampling, animal welfare, reporting & clearance management Non- veterinary field response manager, responsible for all non- veterinary tasks, including culling, cleaning & disinfection & logistics Health & Safety officer supervising the human health during the operation, including Occupational Health & Safety, gate management Administration & Finance officer supervising the financial management, registration and communication processes Clear - enforceable - instructions instead of on-the-job training Each farm needs its own outbreak response plan 4 2014 Applied Veterinary Technologies Europe AB
  • 5. Culling Official definitions According to the OIE Carrying out under the vet authority, the killing of animals infected and suspected to be infected According to the FAO Designation of clean & infected zones Intensive disease surveillance within the infected zone Quarantine of livestock movement Immediate slaughter and disposal of all susceptible animals (depopulation) 5 2014 Applied Veterinary Technologies Europe AB
  • 6. Culling - Animal Welfare - Animal suffering increases contamination risks Birds sweat extremely when they are killed under stressed conditions Sweating causes the skin and feathers to be wet, creating the perfect environment for viruses containment Viruses hidden under feathers Animal cruelty upsets people International protests Negative impact on consumption of poultry products 6 2014 Applied Veterinary Technologies Europe AB
  • 7. 7 Summarizing Strategy What needs to be achieved Depopulate within 24-48 hours Use the most appropriate culling method: Killing humanly, according to the International standards Limited number of operators and easy to operate Limited exposure between responders and animals Use the technique that fits the outbreak situation Create an outbreak response plan for each farm location in advance 2014 Applied Veterinary Technologies Europe AB
  • 8. Poultry Killing Methods - Recommended by OIE - 4 generic categories: Physical Chemical Electrical Gaseous agents CO2 gas stunning Anoxia method (high expansion foam filled with 100% Nitrogen) Not recommended by the OIE: Low expansion fire fighting foam 8 2014 Applied Veterinary Technologies Europe AB
  • 9. Physical stunning 9 2014 Applied Veterinary Technologies Europe AB
  • 10. Electrical stunning 10 2014 Applied Veterinary Technologies Europe AB
  • 11. CO2 gas stunning Large-scale 1.100 liter containers 2014 Applied Veterinary Technologies Europe AB
  • 12. CO2 gas stunning Alternative container systems 12 2014 Applied Veterinary Technologies Europe AB
  • 13. CO2 gas stunning Stable gassing 13 2014 Applied Veterinary Technologies Europe AB
  • 14. Wet foam stunning Fire fighting foam 14 2014 Applied Veterinary Technologies Europe AB
  • 15. High expansion Nitrogen foam The Anoxia method High expansion foam bubbles, created under low pressure condition kills by Anoxia total absence of Oxygen under atmospheric circumstances nitrogen and the water/soap solution are mixed in a foam nozzle Suitable for all sorts of mammals and types of housing Picture 15.4 Picture 15.2 Picture 15.3 Picture 15.5 Picture 15.6 Picture 15.1 15 2014 Applied Veterinary Technologies Europe AB
  • 16. Carcasses and dead birds Feed stock Eggs and egg trays Litter and beddings Manure Organic waste products Organic building materials impossible to decontaminate Disposables used during the response operation 16 Contaminated materials - Organic materials & disposables - 2014 Applied Veterinary Technologies Europe AB
  • 17. Managing contaminated materials All contaminated materials must be Collected and conserved to prevent contamination Stored until further processed; transported to disposal location Safely disposed 17 2014 Applied Veterinary Technologies Europe AB
  • 18. Collection & conservation Although the virus reproduction stops after the birds are culled, they maintain a serious threat: Spray a soapy water over all materials and wait 24 hours before the next disposal phase can start Viruses survive in organic materials, contaminated water, dust on the feathers, cages, troughs, and manure belts Soap helps to break down the virus load on the infected materials 18 2014 Applied Veterinary Technologies Europe AB
  • 19. Temporary storage Temporary storage of contaminated materials impose risks When the farm is located within a densely populated area When the distance between farm and disposal area becomes critical for timely response When there are large volumes of contaminated materials on the farm 19 2014 Applied Veterinary Technologies Europe AB
  • 20. 20 Temporary cold store on the farm Minimizing risks of virus reintroduction Package infected materials in 1 M3 disposable containers on pallets Freeze /store the materials safely on side until safe disposal can be guaranteed Safe handling & transporting frozen plastic bags Frozen contaminated plastic bags are hard to rip open Materials on pallets are simple and easy to handling logistically 2014 Applied Veterinary Technologies Europe AB
  • 21. Considerations to on site storage - use disposable containers - Contaminated materials need to be prepared for safe transportation: use disposable containers for this purpose Use heavy duty plastic bags with a maximum capacity of 1 m3 Place the plastic bags in a disposable container and place the container on a disposable pallet Fill the container with contaminated materials Ziploc the plastic bag after it is full Remove the disposable container Disinfect the enclosed plastic bag and the disposable pallet Store the pallet safely until further handling 21 2014 Applied Veterinary Technologies Europe AB
  • 22. Incineration Picture 18.1 There are three broad categories of incineration techniques currently in use: Open-air burning Fixed-facility incineration Air-curtain incineration Follow sites fire safety procedures. Ensure local Fire Department is aware of any open burning. Wear PPE issued by your supervisor including respirator and proximity suit. Follow the sites heat stress reduction plan. Additional training is required when using fire extinguishers. Air-curtains present significant risks, stay back from the edge! Air-curtain incineration 22 2014 Applied Veterinary Technologies Europe AB