SlideShare ist ein Scribd-Unternehmen logo
1 von 4
Downloaden Sie, um offline zu lesen
Transmission	
  risks	
  within	
  the	
  poultry	
  industry	
  
By:	
  Harm	
  Kiezebrink,	
  Principal	
  consultant	
  Applied	
  Veterinary	
  Technologies	
  AB	
  
Large-scale response leads to further spreading
During	
  depopulation	
  viruses	
  are	
  easily	
  transmitted	
  to	
  responders	
  who	
  are	
  tasked	
  for	
  
taking	
  layers	
  out	
  of	
  their	
  cages,	
  transport	
  them	
  through	
  the	
  narrow	
  walkways	
  between	
  
the	
  cages	
  to	
  a	
  disposal	
  container	
  placed	
  outside	
  of	
  the	
  house.	
  Although	
  humans	
  are	
  
supposed	
  to	
  be	
  less	
  susceptible,	
  they	
  can	
  become	
  carrier	
  of	
  the	
  virus.	
  Only	
  the	
  highest	
  
level	
  of	
  biosecurity	
  could	
  prevent	
  the	
  transmission	
  through	
  the	
  humans	
  and	
  materials	
  
that	
  have	
  been	
  in	
  direct	
  contact	
  with	
  infected	
  animals	
  and	
  materials.	
  
New statistics on the 2003 outbreak in Holland
Before	
  introduction	
  of	
  the	
  ban	
  on	
  conventional	
  battery	
  cages	
  in	
  the	
  EU	
  from	
  January	
  
2012,	
  battery	
  cages	
  were	
  still	
  common	
  in	
  the	
  Netherlands.	
  An	
  evaluation	
  of	
  the	
  
statistics	
  of	
  the	
  Dutch	
  outbreak	
  (in	
  total	
  1.134	
  culling	
  operations	
  	
  -­‐	
  more	
  than	
  29	
  million	
  
birds)	
  shows	
  that	
  79.2%	
  of	
  all	
  the	
  infected/suspected	
  farms	
  H7N7	
  was	
  reintroduced	
  
were	
  labor-­‐intensive	
  layers/parent	
  stock	
  farms;	
  8,7	
  %	
  were	
  turkey	
  farms.	
  	
  
Compared	
  to	
  the	
  production	
  of	
  broilers,	
  the	
  layer	
  industry	
  is	
  much	
  more	
  labor	
  intensive.	
  
Specialized	
  agricultural	
  service	
  providers	
  are	
  contracted	
  to	
  supply	
  the	
  workforce	
  for	
  
tasks	
  like	
  egg	
  collection,	
  depopulation,	
  cleaning	
  &	
  disinfection,	
  vaccination	
  etc.	
  The	
  
same	
  service	
  providers	
  are	
  contracted	
  to	
  supply	
  the	
  workforce	
  to	
  depopulate	
  the	
  farms	
  
during	
  outbreak	
  situations.	
  	
  
	
  
Because	
  this	
  labor	
  force	
  contains	
  of	
  staff	
  that	
  is	
  partly	
  contracted	
  on	
  short-­‐term	
  basis	
  
(for	
  instance	
  seasonal	
  workers),	
  it	
  is	
  almost	
  impossible	
  keep	
  track	
  of	
  where	
  the	
  staff	
  is	
  
coming	
  from	
  or	
  where	
  it	
  will	
  be	
  working	
  in	
  the	
  future.	
  Even	
  when	
  all	
  farm	
  workers	
  are	
  
officially	
  registered,	
  it	
  is	
  very	
  difficult	
  to	
  guarantee	
  that	
  the	
  workforce	
  in	
  teams	
  that	
  only	
  
carry	
  out	
  normal	
  farm	
  work	
  and	
  teams	
  that	
  strictly	
  work	
  as	
  responders	
  on	
  infected	
  
farms.	
  This	
  makes	
  the	
  layer-­‐	
  and	
  turkey	
  industry	
  vulnerable	
  for	
  labor	
  related	
  risks	
  of	
  
79.2%	
  
12.0%	
  
8.7%	
  
Type	
  of	
  farms	
  infected	
  during	
  the	
  H7N7	
  outbreak	
  in	
  Holland	
  
Labor-­‐intensive	
  farms	
  (Layers/parent	
  
stock)	
  
Labor-­‐extensive	
  farms	
  (broiler/
breeders)	
  
Turkey	
  farms	
  
Transmission	
  risks	
  within	
  the	
  poultry	
  industry	
  
By:	
  Harm	
  Kiezebrink,	
  Principal	
  consultant	
  Applied	
  Veterinary	
  Technologies	
  AB	
  
transmission.	
  It	
  was	
  possibly	
  one	
  of	
  the	
  main	
  reasons	
  why	
  the	
  outbreak	
  in	
  Holland	
  in	
  
2003	
  was	
  so	
  difficult	
  to	
  control.	
  	
  	
  
Specific risks related to layer- and turkey farms
Managing	
  simple	
  response	
  tasks	
  might	
  look	
  simple,	
  but	
  these	
  get	
  extremely	
  
complicated:	
  most	
  responders	
  are	
  untrained	
  and	
  insufficiently	
  prepared	
  to	
  carry	
  out	
  
heavy	
  labor	
  in	
  narrow	
  houses,	
  under	
  stressful	
  circumstances,	
  and	
  wearing	
  
uncomfortable	
  protective	
  clothing.	
  Breaches	
  of	
  biosecurity	
  during	
  outbreaks	
  are	
  
belonging	
  therefore	
  to	
  the	
  most	
  likely	
  routes	
  of	
  transmission.	
  
What	
  happened	
  to	
  the	
  industry	
  The	
  veterinary	
  authorities	
  in	
  Iowa	
  and	
  Minnesota	
  face	
  
huge	
  managerial	
  and	
  logistical	
  challenges	
  when	
  faced	
  with	
  depopulation	
  and	
  biosecurity	
  
protection	
  on	
  the	
  highest	
  level	
  at	
  the	
  same	
  time.	
  	
  The	
  labor	
  intensity	
  of	
  response	
  
activities	
  –	
  and	
  the	
  number	
  of	
  people	
  needed	
  to	
  depopulate	
  layer	
  farms	
  with	
  an	
  average	
  
size	
  per	
  farm	
  of	
  almost	
  1	
  million	
  layers	
  (compared	
  to	
  an	
  average	
  21,500	
  layers	
  on	
  Dutch	
  
layer	
  farms)	
  and	
  -­‐in	
  average-­‐	
  51,800	
  turkeys	
  per	
  farm	
  (compared	
  to	
  13,250	
  turkeys	
  on	
  
Dutch	
  turkey	
  farms).	
  The	
  enormous	
  size	
  of	
  farms	
  will	
  make	
  it	
  almost	
  impossible	
  to	
  
prevent	
  transmission	
  outside	
  the	
  infected	
  areas.	
  
The	
  size	
  of	
  the	
  U.S.	
  farms	
  is	
  one	
  of	
  the	
  most	
  complicating	
  factors	
  to	
  bring	
  the	
  outbreak	
  
under	
  control.	
  	
  
	
  
Similar	
  to	
  the	
  situation	
  of	
  the	
  Dutch	
  outbreak	
  specialized	
  poultry	
  workers	
  are	
  used	
  
simultaneously	
  as	
  responders	
  during	
  outbreak	
  situations.	
  And	
  because	
  of	
  that,	
  farm	
  
activities	
  on	
  non-­‐infected	
  farms	
  and	
  response	
  activities	
  on	
  suspected/infected	
  farms	
  
need	
  to	
  be	
  strictly	
  separated.	
  This	
  in	
  itself	
  causes	
  massive	
  pressure	
  on	
  the	
  veterinary	
  
authorities	
  to	
  deploy	
  sufficient	
  responders.	
  For	
  that	
  reason,	
  responders	
  are	
  brought	
  in	
  
from	
  different	
  parts	
  of	
  the	
  country,	
  opening	
  up	
  the	
  transmission	
  routes	
  to	
  uninfected	
  
areas	
  and	
  causing	
  introduction	
  of	
  viruses	
  into	
  uninfected	
  areas.	
  	
  
Acute responder shortages and criminal opportunities
A	
  study	
  published	
  in	
  The	
  Lancet	
  (2004)i
	
  noted	
  an	
  unexpectedly	
  high	
  number	
  of	
  
transmissions	
  of	
  avian	
  influenza	
  A	
  virus	
  subtype	
  H7N7	
  in	
  people	
  directly	
  involved	
  in	
  
handling	
  infected	
  poultry	
  during	
  the	
  2003	
  outbreak	
  in	
  the	
  Netherlands.	
  This	
  provides	
  
23%	
  
68%	
  
9%	
  
Infected	
  farm	
  type	
  
Chickens	
  
Turkeys	
  
Mixed	
  
poultry	
  
85%	
  
15%	
  
Infected	
  poultry	
  species	
  
Chickens	
  
Turkeys	
  
Transmission	
  risks	
  within	
  the	
  poultry	
  industry	
  
By:	
  Harm	
  Kiezebrink,	
  Principal	
  consultant	
  Applied	
  Veterinary	
  Technologies	
  AB	
  
evidence	
  for	
  person-­‐to-­‐person	
  transmission	
  pathways.	
  	
  
Although	
  in	
  2003	
  the	
  Dutch	
  veterinary	
  authority	
  RVV	
  did	
  not	
  expect	
  that	
  the	
  risk	
  of	
  
infection	
  of	
  responders	
  turned	
  out	
  to	
  be	
  50%,	
  it	
  created	
  a	
  directive	
  to	
  minimize	
  the	
  risks	
  
that	
  the	
  virus	
  would	
  transmit	
  through	
  farm	
  workers	
  and	
  responders.	
  The	
  RVV	
  ruled	
  that	
  
it	
  was	
  strictly	
  forbidden	
  for	
  farm	
  workers	
  and	
  responders	
  who	
  had	
  been	
  active	
  on	
  
infected	
  farms	
  to	
  visit	
  and/or	
  work	
  on	
  non-­‐infected	
  farms	
  within	
  a	
  time	
  frame	
  of	
  72	
  
hours.	
  Contractors	
  were	
  obliged	
  to	
  keep	
  a	
  strict	
  record	
  of	
  where	
  their	
  staff	
  has	
  been	
  
working.	
  	
  
This	
  measure	
  complicated	
  the	
  task	
  of	
  finding	
  enough	
  staff	
  to	
  carry	
  out	
  response	
  
activities.	
  RVV	
  took	
  a	
  bold	
  step	
  and	
  decided	
  to	
  deploy	
  asylum	
  seekers	
  through	
  a	
  
specialized	
  agricultural	
  service	
  in	
  the	
  south	
  of	
  the	
  Netherlands	
  provider	
  because	
  of	
  the	
  
urgency	
  and	
  the	
  acute	
  shortage	
  of	
  staff.	
  All	
  these	
  hundreds	
  of	
  	
  asylum	
  seekers	
  were	
  
subject	
  to	
  a	
  fake	
  registration	
  under	
  the	
  same	
  name	
  (F.	
  Vogelpest,	
  birdflu	
  in	
  Dutch),	
  born	
  
on	
  April	
  14,	
  	
  2003,	
  unmarried,	
  and	
  all	
  with	
  the	
  same	
  social	
  security	
  number	
  2494	
  88	
  039.	
  	
  
This	
  unfortunate	
  step	
  of	
  RVV	
  made	
  it	
  almost	
  impossible	
  to	
  reconstruct	
  the	
  transmission	
  
route	
  through	
  this	
  group	
  of	
  responders.	
  	
  
These	
  emergency	
  responders	
  	
  were	
  normaly	
  deployed	
  as	
  
seasonal	
  laborers	
  to	
  harvest	
  asparagus.	
  With	
  the	
  support	
  of	
  
a	
  local	
  tax	
  officer,	
  these	
  untrained	
  laborers	
  were	
  deployed	
  in	
  
the	
  area	
  of	
  the	
  first	
  outbreak	
  in	
  the	
  center	
  of	
  the	
  
Netherlands	
  to	
  collect	
  dead	
  chickens	
  after	
  stable	
  gassing.	
  
One	
  month	
  later,	
  a	
  second	
  wave	
  of	
  outbreaks	
  took	
  place	
  in	
  
the	
  direct	
  proximity	
  of	
  this	
  service	
  provider	
  in	
  the	
  south,	
  in	
  
an	
  area	
  with	
  mainly	
  layer	
  farms	
  that	
  used	
  the	
  services	
  of	
  this	
  
service	
  provider.	
  	
  
It	
  is	
  difficult	
  to	
  determine	
  where	
  his	
  fraudulent	
  activities	
  
started	
  and	
  stopped,	
  so	
  it	
  is	
  also	
  difficult	
  to	
  find	
  out	
  what	
  the	
  role	
  his	
  staff	
  –	
  including	
  
the	
  staff	
  he	
  normally	
  deployed	
  in	
  the	
  poultry	
  industry	
  in	
  the	
  southern	
  part	
  of	
  the	
  
Netherlands	
  –	
  actually	
  was	
  in	
  terms	
  of	
  transmission	
  from	
  the	
  area	
  around	
  Barneveld	
  to	
  
the	
  farms	
  in	
  the	
  southern	
  part	
  of	
  the	
  Netherlands	
  and	
  Belgium	
  (April	
  16,	
  2003	
  
Meeuwen-­‐Gruitrode).	
  
The	
  owner	
  of	
  the	
  service	
  provider	
  was	
  arrested	
  in	
  2003,	
  and	
  in	
  June	
  2007,	
  he	
  was	
  
convicted	
  for	
  tempering	
  with	
  the	
  registration	
  of	
  responders	
  that	
  were	
  deployed	
  during	
  
the	
  outbreak.	
  This	
  story	
  has	
  been	
  well	
  documented	
  in	
  the	
  Dutch	
  pressii
,	
  but	
  never	
  been	
  
published	
  internationally.	
  
Carcass disposal
A	
  similar	
  situation	
  is	
  occurring	
  within	
  the	
  U.S.	
  poultry	
  industry	
  at	
  this	
  moment,	
  but	
  even	
  
on	
  a	
  larger	
  scale,	
  due	
  to	
  the	
  farming	
  infrastructure	
  and	
  the	
  staggering	
  numbers	
  of	
  birds	
  
that	
  are	
  culled	
  -­‐	
  more	
  than	
  46	
  million/170	
  million	
  tons	
  of	
  carcasses	
  -­‐	
  and	
  need	
  to	
  be	
  
Transmission	
  risks	
  within	
  the	
  poultry	
  industry	
  
By:	
  Harm	
  Kiezebrink,	
  Principal	
  consultant	
  Applied	
  Veterinary	
  Technologies	
  AB	
  
disposed	
  of.	
  In	
  an	
  article	
  published	
  in	
  Des	
  moines	
  Gazetteiii
	
  Tom	
  Vilsack,	
  the	
  U.S.	
  
secretary	
  of	
  agriculture	
  recently	
  stated	
  that	
  the	
  federal	
  government	
  is	
  addressing	
  the	
  
outbreak	
  by	
  attempting	
  to	
  be	
  thorough,	
  safe	
  and	
  expedient,	
  but	
  that	
  process	
  was	
  
slowed	
  by	
  a	
  lack	
  of	
  locations	
  to	
  dispose	
  of	
  the	
  destroyed	
  birds.	
  	
  
The	
  outbreak	
  in	
  the	
  U.S.	
  is	
  unprecedented	
  in	
  the	
  history	
  of	
  poultry	
  farming.	
  All	
  infected	
  
birds	
  need	
  to	
  be	
  handled	
  at	
  the	
  farm,	
  transported	
  to	
  the	
  disposal	
  location	
  and	
  than	
  
buried	
  or	
  incinerated.	
  Vilsack	
  pointed	
  out	
  that	
  the	
  disposal	
  process	
  has	
  been	
  holding	
  up	
  
the	
  process	
  of	
  stamping	
  out.	
  He	
  said	
  the	
  government	
  has	
  reached	
  agreements	
  with	
  a	
  
handful	
  of	
  landfills	
  and	
  incinerators,	
  so	
  he	
  hopes	
  disposal	
  will	
  begin	
  to	
  move	
  more	
  
briskly.	
  He	
  said	
  finding	
  willing	
  partners	
  that	
  are	
  willing	
  to	
  dispose	
  the	
  carcasses	
  was	
  not	
  
easy.	
  Some	
  facilities	
  expressed	
  willingness	
  to	
  take	
  destroyed	
  birds,	
  but	
  backed	
  off	
  after	
  
hearing	
  concerns	
  from	
  neighbors.	
  
	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  
i	
  Transmission	
  of	
  H7H7	
  avian	
  influenza	
  A	
  virus	
  to	
  human	
  beings	
  during	
  a	
  large	
  outbreak	
  in	
  
commercial	
  poultry	
  farms	
  in	
  the	
  Netherlands,	
  published	
  in	
  the	
  Lancet	
  Volume	
  363,	
  February	
  21,	
  
2004	
  
ii	
  http://vorige.nrc.nl/binnenland/article1590983.ece	
  
iii	
  http://thegazette.com/subject/news/business/vilsack-­‐help-­‐for-­‐bird-­‐flu-­‐on-­‐the-­‐way-­‐20150526	
  

Weitere ähnliche Inhalte

Andere mochten auch

EFSA assessment EU 1099/2009
EFSA assessment EU 1099/2009EFSA assessment EU 1099/2009
EFSA assessment EU 1099/2009Harm Kiezebrink
 
Historical overview of male day-old chicks as animal feed
Historical overview of male day-old chicks as animal feedHistorical overview of male day-old chicks as animal feed
Historical overview of male day-old chicks as animal feedHarm Kiezebrink
 
Dossier investigation: identification of the agent
Dossier investigation: identification of the agentDossier investigation: identification of the agent
Dossier investigation: identification of the agentGeranne Kiezebrink
 
EFSA AHAW report on monitoring procedures at poultry slaughterhouses
EFSA AHAW report on monitoring procedures at poultry slaughterhousesEFSA AHAW report on monitoring procedures at poultry slaughterhouses
EFSA AHAW report on monitoring procedures at poultry slaughterhousesHarm Kiezebrink
 
EFSA Guidance on assessment new stunning & slaughter methods
EFSA Guidance on assessment new stunning & slaughter methodsEFSA Guidance on assessment new stunning & slaughter methods
EFSA Guidance on assessment new stunning & slaughter methodsHarm Kiezebrink
 
The relevance of the farming community regarding zoonoses
The relevance of the farming community regarding zoonosesThe relevance of the farming community regarding zoonoses
The relevance of the farming community regarding zoonosesHarm Kiezebrink
 
WHO warns of H7 N9 pandemic
WHO warns of H7 N9 pandemic WHO warns of H7 N9 pandemic
WHO warns of H7 N9 pandemic Harm Kiezebrink
 
One World - One Health presentation Katinka de Balogh FAO
One World - One Health presentation Katinka de Balogh FAOOne World - One Health presentation Katinka de Balogh FAO
One World - One Health presentation Katinka de Balogh FAOHarm Kiezebrink
 
Anoxia - applying the technique
Anoxia - applying the techniqueAnoxia - applying the technique
Anoxia - applying the techniqueHarm Kiezebrink
 
Animal Euthanasia: What are the challenges?
Animal Euthanasia: What are the challenges?Animal Euthanasia: What are the challenges?
Animal Euthanasia: What are the challenges?Harm Kiezebrink
 

Andere mochten auch (11)

EFSA assessment EU 1099/2009
EFSA assessment EU 1099/2009EFSA assessment EU 1099/2009
EFSA assessment EU 1099/2009
 
Historical overview of male day-old chicks as animal feed
Historical overview of male day-old chicks as animal feedHistorical overview of male day-old chicks as animal feed
Historical overview of male day-old chicks as animal feed
 
Dossier investigation: identification of the agent
Dossier investigation: identification of the agentDossier investigation: identification of the agent
Dossier investigation: identification of the agent
 
EFSA AHAW report on monitoring procedures at poultry slaughterhouses
EFSA AHAW report on monitoring procedures at poultry slaughterhousesEFSA AHAW report on monitoring procedures at poultry slaughterhouses
EFSA AHAW report on monitoring procedures at poultry slaughterhouses
 
EFSA Guidance on assessment new stunning & slaughter methods
EFSA Guidance on assessment new stunning & slaughter methodsEFSA Guidance on assessment new stunning & slaughter methods
EFSA Guidance on assessment new stunning & slaughter methods
 
The relevance of the farming community regarding zoonoses
The relevance of the farming community regarding zoonosesThe relevance of the farming community regarding zoonoses
The relevance of the farming community regarding zoonoses
 
WHO warns of H7 N9 pandemic
WHO warns of H7 N9 pandemic WHO warns of H7 N9 pandemic
WHO warns of H7 N9 pandemic
 
Anoxia: what is it?
Anoxia:   what is it?Anoxia:   what is it?
Anoxia: what is it?
 
One World - One Health presentation Katinka de Balogh FAO
One World - One Health presentation Katinka de Balogh FAOOne World - One Health presentation Katinka de Balogh FAO
One World - One Health presentation Katinka de Balogh FAO
 
Anoxia - applying the technique
Anoxia - applying the techniqueAnoxia - applying the technique
Anoxia - applying the technique
 
Animal Euthanasia: What are the challenges?
Animal Euthanasia: What are the challenges?Animal Euthanasia: What are the challenges?
Animal Euthanasia: What are the challenges?
 

Mehr von Harm Kiezebrink

Applying Firefighting Foam for Depopulation.pdf
Applying Firefighting Foam for Depopulation.pdfApplying Firefighting Foam for Depopulation.pdf
Applying Firefighting Foam for Depopulation.pdfHarm Kiezebrink
 
World bank evaluating the economic consequences of avian influenza
World bank evaluating the economic consequences of avian influenzaWorld bank evaluating the economic consequences of avian influenza
World bank evaluating the economic consequences of avian influenzaHarm Kiezebrink
 
Gas alternatives to carbon dioxide for euthanasia a piglet perspective
Gas alternatives to carbon dioxide for euthanasia  a piglet perspectiveGas alternatives to carbon dioxide for euthanasia  a piglet perspective
Gas alternatives to carbon dioxide for euthanasia a piglet perspectiveHarm Kiezebrink
 
Laves presentation practical experiences in the culling of poultry in germany
Laves presentation practical experiences in the culling of poultry in germanyLaves presentation practical experiences in the culling of poultry in germany
Laves presentation practical experiences in the culling of poultry in germanyHarm Kiezebrink
 
Berg et al. 2014 killing of spent laying hens using co2 in poultry barns
Berg et al. 2014 killing of spent laying hens using co2 in poultry barnsBerg et al. 2014 killing of spent laying hens using co2 in poultry barns
Berg et al. 2014 killing of spent laying hens using co2 in poultry barnsHarm Kiezebrink
 
Dossier transmission: Transmission of Avian Influenza Virus to Dogs
Dossier transmission: Transmission of Avian Influenza  Virus to DogsDossier transmission: Transmission of Avian Influenza  Virus to Dogs
Dossier transmission: Transmission of Avian Influenza Virus to DogsHarm Kiezebrink
 
Spatio temporal dynamics of global H5N1 outbreaks match bird migration patterns
Spatio temporal dynamics of global H5N1 outbreaks match bird migration patternsSpatio temporal dynamics of global H5N1 outbreaks match bird migration patterns
Spatio temporal dynamics of global H5N1 outbreaks match bird migration patternsHarm Kiezebrink
 
Spatial, temporal and genetic dynamics of H5N1 in china
Spatial, temporal and genetic dynamics of H5N1 in chinaSpatial, temporal and genetic dynamics of H5N1 in china
Spatial, temporal and genetic dynamics of H5N1 in chinaHarm Kiezebrink
 
Different environmental drivers of H5N1 outbreaks in poultry and wild birds
Different environmental drivers of H5N1 outbreaks in poultry and wild birdsDifferent environmental drivers of H5N1 outbreaks in poultry and wild birds
Different environmental drivers of H5N1 outbreaks in poultry and wild birdsHarm Kiezebrink
 
H5N8 virus dutch outbreak (2014) linked to sequences of strains from asia
H5N8 virus dutch outbreak (2014) linked to sequences of strains from asiaH5N8 virus dutch outbreak (2014) linked to sequences of strains from asia
H5N8 virus dutch outbreak (2014) linked to sequences of strains from asiaHarm Kiezebrink
 
Wind mediated spread of LPAI
Wind mediated spread of LPAIWind mediated spread of LPAI
Wind mediated spread of LPAIHarm Kiezebrink
 
Per contact probability of infection by Highly Pathogenic Avian Influenza
Per contact probability of infection by Highly Pathogenic Avian InfluenzaPer contact probability of infection by Highly Pathogenic Avian Influenza
Per contact probability of infection by Highly Pathogenic Avian InfluenzaHarm Kiezebrink
 
Supplementary information wind mediated transmission HPAI
Supplementary information wind mediated transmission HPAISupplementary information wind mediated transmission HPAI
Supplementary information wind mediated transmission HPAIHarm Kiezebrink
 
Avian Influenza in the Netherlands 2003: comparing culling methods
Avian Influenza in the Netherlands 2003: comparing culling methodsAvian Influenza in the Netherlands 2003: comparing culling methods
Avian Influenza in the Netherlands 2003: comparing culling methodsHarm Kiezebrink
 
Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...
Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...
Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...Harm Kiezebrink
 
Risk analysis on the role of wild ducks by the introduction of Avian Influenz...
Risk analysis on the role of wild ducks by the introduction of Avian Influenz...Risk analysis on the role of wild ducks by the introduction of Avian Influenz...
Risk analysis on the role of wild ducks by the introduction of Avian Influenz...Harm Kiezebrink
 
Anoxia presentation during the AI symposium in Taiwan, March 2015
Anoxia presentation during the AI symposium in Taiwan, March 2015Anoxia presentation during the AI symposium in Taiwan, March 2015
Anoxia presentation during the AI symposium in Taiwan, March 2015Harm Kiezebrink
 
Overview of recent outbreaks of H5N8-High Pathogen Avian Influenza in Europe...
Overview of recent outbreaks of  H5N8-High Pathogen Avian Influenza in Europe...Overview of recent outbreaks of  H5N8-High Pathogen Avian Influenza in Europe...
Overview of recent outbreaks of H5N8-High Pathogen Avian Influenza in Europe...Harm Kiezebrink
 
OIE terrestrial code killing of animals for disease prevention
OIE terrestrial code killing of animals for disease preventionOIE terrestrial code killing of animals for disease prevention
OIE terrestrial code killing of animals for disease preventionHarm Kiezebrink
 
AI transmission risks: Analysis of biosecurity measures and contact structure
AI transmission risks: Analysis of biosecurity measures and contact structureAI transmission risks: Analysis of biosecurity measures and contact structure
AI transmission risks: Analysis of biosecurity measures and contact structureHarm Kiezebrink
 

Mehr von Harm Kiezebrink (20)

Applying Firefighting Foam for Depopulation.pdf
Applying Firefighting Foam for Depopulation.pdfApplying Firefighting Foam for Depopulation.pdf
Applying Firefighting Foam for Depopulation.pdf
 
World bank evaluating the economic consequences of avian influenza
World bank evaluating the economic consequences of avian influenzaWorld bank evaluating the economic consequences of avian influenza
World bank evaluating the economic consequences of avian influenza
 
Gas alternatives to carbon dioxide for euthanasia a piglet perspective
Gas alternatives to carbon dioxide for euthanasia  a piglet perspectiveGas alternatives to carbon dioxide for euthanasia  a piglet perspective
Gas alternatives to carbon dioxide for euthanasia a piglet perspective
 
Laves presentation practical experiences in the culling of poultry in germany
Laves presentation practical experiences in the culling of poultry in germanyLaves presentation practical experiences in the culling of poultry in germany
Laves presentation practical experiences in the culling of poultry in germany
 
Berg et al. 2014 killing of spent laying hens using co2 in poultry barns
Berg et al. 2014 killing of spent laying hens using co2 in poultry barnsBerg et al. 2014 killing of spent laying hens using co2 in poultry barns
Berg et al. 2014 killing of spent laying hens using co2 in poultry barns
 
Dossier transmission: Transmission of Avian Influenza Virus to Dogs
Dossier transmission: Transmission of Avian Influenza  Virus to DogsDossier transmission: Transmission of Avian Influenza  Virus to Dogs
Dossier transmission: Transmission of Avian Influenza Virus to Dogs
 
Spatio temporal dynamics of global H5N1 outbreaks match bird migration patterns
Spatio temporal dynamics of global H5N1 outbreaks match bird migration patternsSpatio temporal dynamics of global H5N1 outbreaks match bird migration patterns
Spatio temporal dynamics of global H5N1 outbreaks match bird migration patterns
 
Spatial, temporal and genetic dynamics of H5N1 in china
Spatial, temporal and genetic dynamics of H5N1 in chinaSpatial, temporal and genetic dynamics of H5N1 in china
Spatial, temporal and genetic dynamics of H5N1 in china
 
Different environmental drivers of H5N1 outbreaks in poultry and wild birds
Different environmental drivers of H5N1 outbreaks in poultry and wild birdsDifferent environmental drivers of H5N1 outbreaks in poultry and wild birds
Different environmental drivers of H5N1 outbreaks in poultry and wild birds
 
H5N8 virus dutch outbreak (2014) linked to sequences of strains from asia
H5N8 virus dutch outbreak (2014) linked to sequences of strains from asiaH5N8 virus dutch outbreak (2014) linked to sequences of strains from asia
H5N8 virus dutch outbreak (2014) linked to sequences of strains from asia
 
Wind mediated spread of LPAI
Wind mediated spread of LPAIWind mediated spread of LPAI
Wind mediated spread of LPAI
 
Per contact probability of infection by Highly Pathogenic Avian Influenza
Per contact probability of infection by Highly Pathogenic Avian InfluenzaPer contact probability of infection by Highly Pathogenic Avian Influenza
Per contact probability of infection by Highly Pathogenic Avian Influenza
 
Supplementary information wind mediated transmission HPAI
Supplementary information wind mediated transmission HPAISupplementary information wind mediated transmission HPAI
Supplementary information wind mediated transmission HPAI
 
Avian Influenza in the Netherlands 2003: comparing culling methods
Avian Influenza in the Netherlands 2003: comparing culling methodsAvian Influenza in the Netherlands 2003: comparing culling methods
Avian Influenza in the Netherlands 2003: comparing culling methods
 
Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...
Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...
Reseach on H9N2: evidence that link outbreaks in Eurasia, China, South Korea,...
 
Risk analysis on the role of wild ducks by the introduction of Avian Influenz...
Risk analysis on the role of wild ducks by the introduction of Avian Influenz...Risk analysis on the role of wild ducks by the introduction of Avian Influenz...
Risk analysis on the role of wild ducks by the introduction of Avian Influenz...
 
Anoxia presentation during the AI symposium in Taiwan, March 2015
Anoxia presentation during the AI symposium in Taiwan, March 2015Anoxia presentation during the AI symposium in Taiwan, March 2015
Anoxia presentation during the AI symposium in Taiwan, March 2015
 
Overview of recent outbreaks of H5N8-High Pathogen Avian Influenza in Europe...
Overview of recent outbreaks of  H5N8-High Pathogen Avian Influenza in Europe...Overview of recent outbreaks of  H5N8-High Pathogen Avian Influenza in Europe...
Overview of recent outbreaks of H5N8-High Pathogen Avian Influenza in Europe...
 
OIE terrestrial code killing of animals for disease prevention
OIE terrestrial code killing of animals for disease preventionOIE terrestrial code killing of animals for disease prevention
OIE terrestrial code killing of animals for disease prevention
 
AI transmission risks: Analysis of biosecurity measures and contact structure
AI transmission risks: Analysis of biosecurity measures and contact structureAI transmission risks: Analysis of biosecurity measures and contact structure
AI transmission risks: Analysis of biosecurity measures and contact structure
 

Kürzlich hochgeladen

User Guide: Pulsar™ Weather Station (Columbia Weather Systems)
User Guide: Pulsar™ Weather Station (Columbia Weather Systems)User Guide: Pulsar™ Weather Station (Columbia Weather Systems)
User Guide: Pulsar™ Weather Station (Columbia Weather Systems)Columbia Weather Systems
 
Microphone- characteristics,carbon microphone, dynamic microphone.pptx
Microphone- characteristics,carbon microphone, dynamic microphone.pptxMicrophone- characteristics,carbon microphone, dynamic microphone.pptx
Microphone- characteristics,carbon microphone, dynamic microphone.pptxpriyankatabhane
 
Pests of soyabean_Binomics_IdentificationDr.UPR.pdf
Pests of soyabean_Binomics_IdentificationDr.UPR.pdfPests of soyabean_Binomics_IdentificationDr.UPR.pdf
Pests of soyabean_Binomics_IdentificationDr.UPR.pdfPirithiRaju
 
Ai in communication electronicss[1].pptx
Ai in communication electronicss[1].pptxAi in communication electronicss[1].pptx
Ai in communication electronicss[1].pptxsubscribeus100
 
Thermodynamics ,types of system,formulae ,gibbs free energy .pptx
Thermodynamics ,types of system,formulae ,gibbs free energy .pptxThermodynamics ,types of system,formulae ,gibbs free energy .pptx
Thermodynamics ,types of system,formulae ,gibbs free energy .pptxuniversity
 
bonjourmadame.tumblr.com bhaskar's girls
bonjourmadame.tumblr.com bhaskar's girlsbonjourmadame.tumblr.com bhaskar's girls
bonjourmadame.tumblr.com bhaskar's girlshansessene
 
FREE NURSING BUNDLE FOR NURSES.PDF by na
FREE NURSING BUNDLE FOR NURSES.PDF by naFREE NURSING BUNDLE FOR NURSES.PDF by na
FREE NURSING BUNDLE FOR NURSES.PDF by naJASISJULIANOELYNV
 
Environmental Biotechnology Topic:- Microbial Biosensor
Environmental Biotechnology Topic:- Microbial BiosensorEnvironmental Biotechnology Topic:- Microbial Biosensor
Environmental Biotechnology Topic:- Microbial Biosensorsonawaneprad
 
User Guide: Orion™ Weather Station (Columbia Weather Systems)
User Guide: Orion™ Weather Station (Columbia Weather Systems)User Guide: Orion™ Weather Station (Columbia Weather Systems)
User Guide: Orion™ Weather Station (Columbia Weather Systems)Columbia Weather Systems
 
GENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptx
GENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptxGENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptx
GENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptxRitchAndruAgustin
 
well logging & petrophysical analysis.pptx
well logging & petrophysical analysis.pptxwell logging & petrophysical analysis.pptx
well logging & petrophysical analysis.pptxzaydmeerab121
 
Pests of castor_Binomics_Identification_Dr.UPR.pdf
Pests of castor_Binomics_Identification_Dr.UPR.pdfPests of castor_Binomics_Identification_Dr.UPR.pdf
Pests of castor_Binomics_Identification_Dr.UPR.pdfPirithiRaju
 
User Guide: Magellan MX™ Weather Station
User Guide: Magellan MX™ Weather StationUser Guide: Magellan MX™ Weather Station
User Guide: Magellan MX™ Weather StationColumbia Weather Systems
 
Quarter 4_Grade 8_Digestive System Structure and Functions
Quarter 4_Grade 8_Digestive System Structure and FunctionsQuarter 4_Grade 8_Digestive System Structure and Functions
Quarter 4_Grade 8_Digestive System Structure and FunctionsCharlene Llagas
 
Introduction of Human Body & Structure of cell.pptx
Introduction of Human Body & Structure of cell.pptxIntroduction of Human Body & Structure of cell.pptx
Introduction of Human Body & Structure of cell.pptxMedical College
 
Pests of Blackgram, greengram, cowpea_Dr.UPR.pdf
Pests of Blackgram, greengram, cowpea_Dr.UPR.pdfPests of Blackgram, greengram, cowpea_Dr.UPR.pdf
Pests of Blackgram, greengram, cowpea_Dr.UPR.pdfPirithiRaju
 
Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...
Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...
Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...D. B. S. College Kanpur
 
Manassas R - Parkside Middle School 🌎🏫
Manassas R - Parkside Middle School 🌎🏫Manassas R - Parkside Middle School 🌎🏫
Manassas R - Parkside Middle School 🌎🏫qfactory1
 
Speech, hearing, noise, intelligibility.pptx
Speech, hearing, noise, intelligibility.pptxSpeech, hearing, noise, intelligibility.pptx
Speech, hearing, noise, intelligibility.pptxpriyankatabhane
 
REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...
REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...
REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...Universidade Federal de Sergipe - UFS
 

Kürzlich hochgeladen (20)

User Guide: Pulsar™ Weather Station (Columbia Weather Systems)
User Guide: Pulsar™ Weather Station (Columbia Weather Systems)User Guide: Pulsar™ Weather Station (Columbia Weather Systems)
User Guide: Pulsar™ Weather Station (Columbia Weather Systems)
 
Microphone- characteristics,carbon microphone, dynamic microphone.pptx
Microphone- characteristics,carbon microphone, dynamic microphone.pptxMicrophone- characteristics,carbon microphone, dynamic microphone.pptx
Microphone- characteristics,carbon microphone, dynamic microphone.pptx
 
Pests of soyabean_Binomics_IdentificationDr.UPR.pdf
Pests of soyabean_Binomics_IdentificationDr.UPR.pdfPests of soyabean_Binomics_IdentificationDr.UPR.pdf
Pests of soyabean_Binomics_IdentificationDr.UPR.pdf
 
Ai in communication electronicss[1].pptx
Ai in communication electronicss[1].pptxAi in communication electronicss[1].pptx
Ai in communication electronicss[1].pptx
 
Thermodynamics ,types of system,formulae ,gibbs free energy .pptx
Thermodynamics ,types of system,formulae ,gibbs free energy .pptxThermodynamics ,types of system,formulae ,gibbs free energy .pptx
Thermodynamics ,types of system,formulae ,gibbs free energy .pptx
 
bonjourmadame.tumblr.com bhaskar's girls
bonjourmadame.tumblr.com bhaskar's girlsbonjourmadame.tumblr.com bhaskar's girls
bonjourmadame.tumblr.com bhaskar's girls
 
FREE NURSING BUNDLE FOR NURSES.PDF by na
FREE NURSING BUNDLE FOR NURSES.PDF by naFREE NURSING BUNDLE FOR NURSES.PDF by na
FREE NURSING BUNDLE FOR NURSES.PDF by na
 
Environmental Biotechnology Topic:- Microbial Biosensor
Environmental Biotechnology Topic:- Microbial BiosensorEnvironmental Biotechnology Topic:- Microbial Biosensor
Environmental Biotechnology Topic:- Microbial Biosensor
 
User Guide: Orion™ Weather Station (Columbia Weather Systems)
User Guide: Orion™ Weather Station (Columbia Weather Systems)User Guide: Orion™ Weather Station (Columbia Weather Systems)
User Guide: Orion™ Weather Station (Columbia Weather Systems)
 
GENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptx
GENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptxGENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptx
GENERAL PHYSICS 2 REFRACTION OF LIGHT SENIOR HIGH SCHOOL GENPHYS2.pptx
 
well logging & petrophysical analysis.pptx
well logging & petrophysical analysis.pptxwell logging & petrophysical analysis.pptx
well logging & petrophysical analysis.pptx
 
Pests of castor_Binomics_Identification_Dr.UPR.pdf
Pests of castor_Binomics_Identification_Dr.UPR.pdfPests of castor_Binomics_Identification_Dr.UPR.pdf
Pests of castor_Binomics_Identification_Dr.UPR.pdf
 
User Guide: Magellan MX™ Weather Station
User Guide: Magellan MX™ Weather StationUser Guide: Magellan MX™ Weather Station
User Guide: Magellan MX™ Weather Station
 
Quarter 4_Grade 8_Digestive System Structure and Functions
Quarter 4_Grade 8_Digestive System Structure and FunctionsQuarter 4_Grade 8_Digestive System Structure and Functions
Quarter 4_Grade 8_Digestive System Structure and Functions
 
Introduction of Human Body & Structure of cell.pptx
Introduction of Human Body & Structure of cell.pptxIntroduction of Human Body & Structure of cell.pptx
Introduction of Human Body & Structure of cell.pptx
 
Pests of Blackgram, greengram, cowpea_Dr.UPR.pdf
Pests of Blackgram, greengram, cowpea_Dr.UPR.pdfPests of Blackgram, greengram, cowpea_Dr.UPR.pdf
Pests of Blackgram, greengram, cowpea_Dr.UPR.pdf
 
Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...
Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...
Fertilization: Sperm and the egg—collectively called the gametes—fuse togethe...
 
Manassas R - Parkside Middle School 🌎🏫
Manassas R - Parkside Middle School 🌎🏫Manassas R - Parkside Middle School 🌎🏫
Manassas R - Parkside Middle School 🌎🏫
 
Speech, hearing, noise, intelligibility.pptx
Speech, hearing, noise, intelligibility.pptxSpeech, hearing, noise, intelligibility.pptx
Speech, hearing, noise, intelligibility.pptx
 
REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...
REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...
REVISTA DE BIOLOGIA E CIÊNCIAS DA TERRA ISSN 1519-5228 - Artigo_Bioterra_V24_...
 

Large scale response leads to further spreading

  • 1. Transmission  risks  within  the  poultry  industry   By:  Harm  Kiezebrink,  Principal  consultant  Applied  Veterinary  Technologies  AB   Large-scale response leads to further spreading During  depopulation  viruses  are  easily  transmitted  to  responders  who  are  tasked  for   taking  layers  out  of  their  cages,  transport  them  through  the  narrow  walkways  between   the  cages  to  a  disposal  container  placed  outside  of  the  house.  Although  humans  are   supposed  to  be  less  susceptible,  they  can  become  carrier  of  the  virus.  Only  the  highest   level  of  biosecurity  could  prevent  the  transmission  through  the  humans  and  materials   that  have  been  in  direct  contact  with  infected  animals  and  materials.   New statistics on the 2003 outbreak in Holland Before  introduction  of  the  ban  on  conventional  battery  cages  in  the  EU  from  January   2012,  battery  cages  were  still  common  in  the  Netherlands.  An  evaluation  of  the   statistics  of  the  Dutch  outbreak  (in  total  1.134  culling  operations    -­‐  more  than  29  million   birds)  shows  that  79.2%  of  all  the  infected/suspected  farms  H7N7  was  reintroduced   were  labor-­‐intensive  layers/parent  stock  farms;  8,7  %  were  turkey  farms.     Compared  to  the  production  of  broilers,  the  layer  industry  is  much  more  labor  intensive.   Specialized  agricultural  service  providers  are  contracted  to  supply  the  workforce  for   tasks  like  egg  collection,  depopulation,  cleaning  &  disinfection,  vaccination  etc.  The   same  service  providers  are  contracted  to  supply  the  workforce  to  depopulate  the  farms   during  outbreak  situations.       Because  this  labor  force  contains  of  staff  that  is  partly  contracted  on  short-­‐term  basis   (for  instance  seasonal  workers),  it  is  almost  impossible  keep  track  of  where  the  staff  is   coming  from  or  where  it  will  be  working  in  the  future.  Even  when  all  farm  workers  are   officially  registered,  it  is  very  difficult  to  guarantee  that  the  workforce  in  teams  that  only   carry  out  normal  farm  work  and  teams  that  strictly  work  as  responders  on  infected   farms.  This  makes  the  layer-­‐  and  turkey  industry  vulnerable  for  labor  related  risks  of   79.2%   12.0%   8.7%   Type  of  farms  infected  during  the  H7N7  outbreak  in  Holland   Labor-­‐intensive  farms  (Layers/parent   stock)   Labor-­‐extensive  farms  (broiler/ breeders)   Turkey  farms  
  • 2. Transmission  risks  within  the  poultry  industry   By:  Harm  Kiezebrink,  Principal  consultant  Applied  Veterinary  Technologies  AB   transmission.  It  was  possibly  one  of  the  main  reasons  why  the  outbreak  in  Holland  in   2003  was  so  difficult  to  control.       Specific risks related to layer- and turkey farms Managing  simple  response  tasks  might  look  simple,  but  these  get  extremely   complicated:  most  responders  are  untrained  and  insufficiently  prepared  to  carry  out   heavy  labor  in  narrow  houses,  under  stressful  circumstances,  and  wearing   uncomfortable  protective  clothing.  Breaches  of  biosecurity  during  outbreaks  are   belonging  therefore  to  the  most  likely  routes  of  transmission.   What  happened  to  the  industry  The  veterinary  authorities  in  Iowa  and  Minnesota  face   huge  managerial  and  logistical  challenges  when  faced  with  depopulation  and  biosecurity   protection  on  the  highest  level  at  the  same  time.    The  labor  intensity  of  response   activities  –  and  the  number  of  people  needed  to  depopulate  layer  farms  with  an  average   size  per  farm  of  almost  1  million  layers  (compared  to  an  average  21,500  layers  on  Dutch   layer  farms)  and  -­‐in  average-­‐  51,800  turkeys  per  farm  (compared  to  13,250  turkeys  on   Dutch  turkey  farms).  The  enormous  size  of  farms  will  make  it  almost  impossible  to   prevent  transmission  outside  the  infected  areas.   The  size  of  the  U.S.  farms  is  one  of  the  most  complicating  factors  to  bring  the  outbreak   under  control.       Similar  to  the  situation  of  the  Dutch  outbreak  specialized  poultry  workers  are  used   simultaneously  as  responders  during  outbreak  situations.  And  because  of  that,  farm   activities  on  non-­‐infected  farms  and  response  activities  on  suspected/infected  farms   need  to  be  strictly  separated.  This  in  itself  causes  massive  pressure  on  the  veterinary   authorities  to  deploy  sufficient  responders.  For  that  reason,  responders  are  brought  in   from  different  parts  of  the  country,  opening  up  the  transmission  routes  to  uninfected   areas  and  causing  introduction  of  viruses  into  uninfected  areas.     Acute responder shortages and criminal opportunities A  study  published  in  The  Lancet  (2004)i  noted  an  unexpectedly  high  number  of   transmissions  of  avian  influenza  A  virus  subtype  H7N7  in  people  directly  involved  in   handling  infected  poultry  during  the  2003  outbreak  in  the  Netherlands.  This  provides   23%   68%   9%   Infected  farm  type   Chickens   Turkeys   Mixed   poultry   85%   15%   Infected  poultry  species   Chickens   Turkeys  
  • 3. Transmission  risks  within  the  poultry  industry   By:  Harm  Kiezebrink,  Principal  consultant  Applied  Veterinary  Technologies  AB   evidence  for  person-­‐to-­‐person  transmission  pathways.     Although  in  2003  the  Dutch  veterinary  authority  RVV  did  not  expect  that  the  risk  of   infection  of  responders  turned  out  to  be  50%,  it  created  a  directive  to  minimize  the  risks   that  the  virus  would  transmit  through  farm  workers  and  responders.  The  RVV  ruled  that   it  was  strictly  forbidden  for  farm  workers  and  responders  who  had  been  active  on   infected  farms  to  visit  and/or  work  on  non-­‐infected  farms  within  a  time  frame  of  72   hours.  Contractors  were  obliged  to  keep  a  strict  record  of  where  their  staff  has  been   working.     This  measure  complicated  the  task  of  finding  enough  staff  to  carry  out  response   activities.  RVV  took  a  bold  step  and  decided  to  deploy  asylum  seekers  through  a   specialized  agricultural  service  in  the  south  of  the  Netherlands  provider  because  of  the   urgency  and  the  acute  shortage  of  staff.  All  these  hundreds  of    asylum  seekers  were   subject  to  a  fake  registration  under  the  same  name  (F.  Vogelpest,  birdflu  in  Dutch),  born   on  April  14,    2003,  unmarried,  and  all  with  the  same  social  security  number  2494  88  039.     This  unfortunate  step  of  RVV  made  it  almost  impossible  to  reconstruct  the  transmission   route  through  this  group  of  responders.     These  emergency  responders    were  normaly  deployed  as   seasonal  laborers  to  harvest  asparagus.  With  the  support  of   a  local  tax  officer,  these  untrained  laborers  were  deployed  in   the  area  of  the  first  outbreak  in  the  center  of  the   Netherlands  to  collect  dead  chickens  after  stable  gassing.   One  month  later,  a  second  wave  of  outbreaks  took  place  in   the  direct  proximity  of  this  service  provider  in  the  south,  in   an  area  with  mainly  layer  farms  that  used  the  services  of  this   service  provider.     It  is  difficult  to  determine  where  his  fraudulent  activities   started  and  stopped,  so  it  is  also  difficult  to  find  out  what  the  role  his  staff  –  including   the  staff  he  normally  deployed  in  the  poultry  industry  in  the  southern  part  of  the   Netherlands  –  actually  was  in  terms  of  transmission  from  the  area  around  Barneveld  to   the  farms  in  the  southern  part  of  the  Netherlands  and  Belgium  (April  16,  2003   Meeuwen-­‐Gruitrode).   The  owner  of  the  service  provider  was  arrested  in  2003,  and  in  June  2007,  he  was   convicted  for  tempering  with  the  registration  of  responders  that  were  deployed  during   the  outbreak.  This  story  has  been  well  documented  in  the  Dutch  pressii ,  but  never  been   published  internationally.   Carcass disposal A  similar  situation  is  occurring  within  the  U.S.  poultry  industry  at  this  moment,  but  even   on  a  larger  scale,  due  to  the  farming  infrastructure  and  the  staggering  numbers  of  birds   that  are  culled  -­‐  more  than  46  million/170  million  tons  of  carcasses  -­‐  and  need  to  be  
  • 4. Transmission  risks  within  the  poultry  industry   By:  Harm  Kiezebrink,  Principal  consultant  Applied  Veterinary  Technologies  AB   disposed  of.  In  an  article  published  in  Des  moines  Gazetteiii  Tom  Vilsack,  the  U.S.   secretary  of  agriculture  recently  stated  that  the  federal  government  is  addressing  the   outbreak  by  attempting  to  be  thorough,  safe  and  expedient,  but  that  process  was   slowed  by  a  lack  of  locations  to  dispose  of  the  destroyed  birds.     The  outbreak  in  the  U.S.  is  unprecedented  in  the  history  of  poultry  farming.  All  infected   birds  need  to  be  handled  at  the  farm,  transported  to  the  disposal  location  and  than   buried  or  incinerated.  Vilsack  pointed  out  that  the  disposal  process  has  been  holding  up   the  process  of  stamping  out.  He  said  the  government  has  reached  agreements  with  a   handful  of  landfills  and  incinerators,  so  he  hopes  disposal  will  begin  to  move  more   briskly.  He  said  finding  willing  partners  that  are  willing  to  dispose  the  carcasses  was  not   easy.  Some  facilities  expressed  willingness  to  take  destroyed  birds,  but  backed  off  after   hearing  concerns  from  neighbors.                                                                                                                   i  Transmission  of  H7H7  avian  influenza  A  virus  to  human  beings  during  a  large  outbreak  in   commercial  poultry  farms  in  the  Netherlands,  published  in  the  Lancet  Volume  363,  February  21,   2004   ii  http://vorige.nrc.nl/binnenland/article1590983.ece   iii  http://thegazette.com/subject/news/business/vilsack-­‐help-­‐for-­‐bird-­‐flu-­‐on-­‐the-­‐way-­‐20150526