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Develop a Surveillance Plan: Premises Classification

The Premises Classification section of an outbreak surveillance plan clearly defines Infected Premises, Contact Premises, Suspect Premises, At-Risk Premises, Monitored, Free Premises, and Vaccinated Premises. These definitions are important because the sampling plan specifies different actions to be taken based on a premises classification.

What to Include

The premises classification section of a surveillance plan should include:

  1. Definitions of each type of premises classification that will be used in the surveillance effort, and
  2. The protocol for investigating and classifying a premises to determine if it is infected and what classification it should receive

Action Items

Write the Premises Classification section of the surveillance plan - Open your draft surveillance plan and modify the information that is already provided in the Premises Classification Section.  Click here to preview the template content in your browser.


Tip: This section should not require much time because the text provided in the template does not need very much modification.

More About Premises Classification

The following table shows in which Area/ Zone the premises classification types occur.

Premises Classifications

Area / Zone Classification

Infected Premises

Infected Zone

Contact Premises

Infected Zone, Buffer, Zone

Suspect Premises

Infected Zone, Buffer Zone,
Surveillance Zone,
Containment Vaccination Zone,
Protection Vaccination Zone

At-Risk Premises

Infected Zone, Buffer Zone

Monitored Premises

Infected Zone, Buffer Zone

Free Premises

Surveillance Zone, Free Area

Vaccinated Premises

Containment Vaccination Zone,
Protection Vaccination Zone

 

Legend:

 

Figure 1.  Example of Premises Locations in Areas/ Zones.  Note: Figure not drawn to scale. The Vaccination Zone can be either a Protection Vaccination Zone or Containment Vaccination Zone.

Premises Definitions

  • Premises where a presumptive positive case or confirmed positive case exists based on laboratory results, compatible clinical signs, case definition, and international standards.

  • Premises with susceptible animals that may have been exposed to the foreign animal disease (FAD) agent, either directly or indirectly, including but not limited to exposure to animals, animal products, fomites, or people from an IP. Contiguous premises in close proximity to an IP may also be classified as a CP. If a CP is outside the Control Area, it must be surrounded by a Buffer Zone until disposition of the CP is determined. Contact Premises are located in the Infected Zone and the Buffer Zone.

  • Premises under investigation due to the presence of susceptible animals reported to have clinical signs compatible with the FAD. This is intended to be a short-term premises designation. Suspect premises are located in the Infected Zone, Buffer Zone, Surveillance Zone, or Vaccination Zone.

  • Premises located in the Control Area with susceptible animals, but none have clinical signs compatible with the FAD. Premises objectively demonstrates that it is not an Infected Premises, Contact Premises, or Suspect Premises. At-Risk Premises seek to move susceptible animals or products within the Control Area by permit. Only At-Risk Premises are eligible to become Monitored Premises.

  • Premises located in the Control Area that objectively demonstrates it is not an Infected Premises, Contact Premises, or Suspect Premises. Only At-Risk Premises are eligible to become Monitored Premises. Monitored Premises meet a set of defined criteria in seeking to move susceptible animals or products out of the Control Area by permit.

  • Premises outside of a Control Area and not a Contact or Suspect Premises. FP can be located within the Surveillance Zone or elsewhere in the Free Area.

  • Premises where emergency vaccination has been performed. This is a secondary premises designation. The primary premises designation will be IP, CP, ARP, MP if located in the Control Area, or FP if located in the Free area. Vaccinated Premises may be located in the Containment Vaccination Zone, typically within the Control Area, or in the Protection Vaccination Zone, typically outside the Control Area.

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