The OIEs approach to zones and compartments

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The OIEs approach to zones and compartments

• David Wilson
• Director International Trade
• OIE

Workshop on OIE international standardsBeijing
2005
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zoning/compartmentalisation

• zoning and regionalisation have the same
  meaning zoning is now used
• zoning and compartmentalisation are procedures
  implemented by a country
• to define sub-populations of different animal
  health status within its territory
• in accordance with the recommendations in the OIE
  Codes
• for the purpose of international trade

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zoning/compartmentalisation

• zoning/compartmentalisation allows a
  concentration of resources where there is
  greatest chance of success
• in controlling or eradicating a disease
• gaining or maintaining market access for certain
  commodities
• where freedom of the whole country from the
  disease is not possible or practicable

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zoning/compartmentalisation

• zoning applies to an animal sub-population
  defined on a geographical basis
• compartmentalisation applies to an animal
  sub-population defined by management practices
  relating to biosecurity

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OIE definitions

• Zone/Region
• a clearly defined part of a country
• Compartment
• one or more establishments (premises in which
  animals are kept) under a clearly defined common
  biosecurity management system

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OIE definitions

• containing an animal sub-population with a
  distinct health status with respect to a specific
  disease or diseases for which required
  surveillance, control and biosecurity measures
  have been applied for the purpose of
  international trade

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application of the concepts

• the extent of a zone is established on the basis
  of natural, artificial or legal boundaries
• the requirements for a compartment are
  established on the basis of management practices
  relating to biosecurity
• by the Veterinary Administration
• geographic considerations and sound management
  practices play a role in the application of both
  concepts

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zones
FREE ZONE
BUFFER ZONE
major road
INFECTED ZONE
BUFFER ZONE
railway
river
FREE ZONE
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Compartment
Equipment
BREEDING FLOCK
FEED SUPPLY
Feed
Equipment
Equipment
Birds
Feed
Feed
Equipment
GROWING FLOCK
Birds
Equipment
Birds
Equipment
Birds
SLAUGHTER HOUSE
GROWING FLOCK
Equipment
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application of the concepts

• there are Code recommendations for zones and
  compartments for diseases for which the concepts
  are appropriate
• the recommendations depend on
• epidemiology of the disease
• environmental factors
• appropriate and applicable biosecurity measures
• necessary surveillance

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epidemiology

• how does the disease spread ?
• by live animals / humans ?
• by meat / eggs / semen ?
• by farm or veterinary equipment ?
• by wind ?
• by biting insects ?
• what species does it affect ?
• clinical signs ?

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environmental factors

• temperature / humidity
• natural barriers
• ocean / major river
• mountain range
• artificial barriers
• state / county boundary
• road / rail system

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biosecurity measures

• management regulations re biosecurity
• dedicated equipment
• staff showering in-and-out
• animals housed vs free range
• imposed movement controls

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surveillance

• necessary surveillance for
• presence / absence of pathogen
• prevalence of disease
• seasonal factors eg biting insects
• strains of virus eg FMD
• intermediate hosts eg tick-borne diseases

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application of the concepts

• a Veterinary Administration must document the
  measures taken to
• identify the animal sub-population
• recognise its distinct health status
• maintain its distinct health status
• dossier will be as detailed as situation requires
• compartmentalisation requires good cooperation
  and trust between industry and govt

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animal sub-population

• dairy cattle herds in 4 adjacent counties
• bison and buffalo in Alberta
• wild pig population in a forest in Germany
• poultry flocks managed by Tysons Inc as a unit
• wild waterfowl in a water catchment area during
  the breeding season
• beef cattle over 3 years of age in the UK

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examples of health status

• infected
• free with vaccination
• free without vaccination
• seasonally free
• unknown

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application of the concepts

• if an exporting country wants to define a zone or
  compartment within its territory for an
  OIE-listed disease, it needs to implement the
  recommendations stipulated in the Code for
  setting up and maintaining such a zone or
  compartment
• or equivalent measures

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application of the concepts

• an importing country should recognise the
  existence of this zone or compartment, subject to
  the application of the appropriate
  recommendations in the Code
• with regard to the importation, or transit
  through its territory, of commodities from that
  zone or compartment

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Uses

• in disease control / erradication campaign
• progressive zoning/compartmentalisation allows
  stepwise approach
• allows concentration of resources where greatest
  chance of success
• in trade zone
• to gain / maintain market access for certain
  commodities
• where whole country freedom not possible /
  practicable

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World Organisation for Animal Health
12 rue de Prony 75017 Paris, France Tel 33 (0)1
44 15 18 88 Fax [phone] Email
oie_at_oie.int http//www.oie.int