The National Animal Health Reporting System (NAHRS) is a joint effort of the United States Animal Health Association (USAHA), American Association of Veterinary Laboratory Diagnosticians (AAVLD), and USDA-APHIS. NAHRS is designed to collect data from chief State animal health officials on the presence of confirmed World Organization for Animal Health (OIE) -reportable diseases and other diseases of interest in specific livestock, poultry, and aquaculture species in the United States. NAHRS functions under the direction of the NAHRS Steering Committee and is managed by the USDA-APHIS-VS.

How NAHRS Information is Used

NAHRS provides key information that is used to complete the 6-month and annual reports that the U.S. is required to submit to the World Organization for Animal Health (OIE). Additional information is also used to compile the reports.

USDA uses NAHRS information in U.S. trade negotiations and to respond to inquiries or audits from trade partners. In these instances, NAHRS demonstrates the integrated, comprehensive, and transparent nature of disease surveillance and reporting in the U.S. By providing timely summary-level information on animal health status to our trading partners, NAHRS helps protect the U.S. share of the global market for animals and animal products.

NAHRS information is also used by the USDA-APHIS-VS-Center for Epidemiology and Animal Health to provide historic information on occurrences of reportable diseases in the U.S. For example, in emerging disease situations, NAHRS information may be used to provide background information on occurrences of similar diseases in the U.S

Benefits of NAHRS Participation to States

Individual states benefit from participating in NAHRS by strengthening their internal animal health surveillance abilities through enhancement of disease reporting infrastructure in their State and using standardized disease reporting criteria. NAHRS reporting information enables States and animal industries to provide timely and accurate information for maintaining and developing international trade. Further, NAHRS reporting provides States with important current and historic records of occurrences of reportable diseases; this information may be used to inform decision-making related to animal health issues including emerging animal health situations.


Confidentiality is a cornerstone of the NAHRS program. Access to the monthly State NAHRS reports is limited to the submitting State and a small number of designated USDA APHIS Veterinary Services staff who are directly involved in coordinating the NAHRS program. Individual owners are never identified in the information submitted by States as part of NAHRS monthly reporting.

NAHRS Steering Committee

The NAHRS Steering Committee includes representatives from the AAVLD, USAHA, USDA-APHIS-Veterinary Services (VS) National Import Export Services (NIES), National Veterinary Services Laboratories (NVSL), participating States, and experts representing each major commodity group: bovine, small ruminants, cervid, equine, swine, poultry, and aquaculture.

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