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Animal Disease Traceability (ADT)

Animal Disease Traceability (ADT) is a cooperative program that is jointly funded and administered by the United States Department of Agriculture (USDA) Animal Plant Health Inspection Service (APHIS) and the Texas Animal Health Commission.

Animal disease traceability, knowing where and when diseased and at-risk animals are or have been, is important to ensuring a rapid response when animal disease events take place. Although animal disease traceability does not prevent disease, an efficient and accurate traceability system reduces the number of animals and response time involved in a disease investigation; which, in turn, reduces the economic impact on owners and affected communities.

Premises Registration

Before an official identification device can be ordered, applicators and/or owners must be assigned a nationally unique number. Once the nationally unique number has been assigned, the applicator and/or owner will provide the number to the official tag distributor.

There are three nationally recognized identification number options; Premised Identification Numbers (PINs), Location Identification Numbers (LIDs), and Scrapie Flock Identification Numbers. To learn more about nationally unique numbers click here.

To request a PIN, LID, or scrapie flock ID contact the TAHC Animal Disease Traceability Team at or 512-719-0733.

Official Identification

Official identification is fundamental to traceability and animal disease programs. Cattle, sheep, goats, swine and other livestock are subject to official identification requirements as outlined by the USDA and TAHC regulations.

For a complete list of acceptable official identification devices click here. Producers are encouraged to contact their veterinarian or TAHC to determine which method of tagging will be best for their operation.

To Find a Tag Allocator or Distributor visit the links below:

Veterinarians interested in becoming an Animal Identification (AIN) device manager (tag distributor) is invited to read the USDA-APHIS AIN Device Manager Guidance Document.

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