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USDA - APHIS - Animal Health - Veterinary Services - National Animal Health Reporting System

NAHRS Reportable Disease List

The NAHRS reportable disease list includes all OIE-reportable diseases for cattle, small ruminants, horses, swine, poultry, and aquaculture; it does not include OIE-reportable diseases for amphibians, bees, lagomorphs, and diseases OIE categorizes as ‘other' (e.g., camelpox and leishmaniasis). View the complete OIE Disease List.

Each year, small modifications are made to the OIE disease list; the NAHRS reportable disease list is modified accordingly at the beginning of the next calendar year.

Diseases on the above lists are numbered with "A," "B," or "N" designations. These designations relate to OIE's historic classification system where diseases were separated into "A" or "B" categories depending on their severity and potential impacts. These designations were discontinued in 2005, but the numbers used for each disease retain their historic “A” or “B” prefix. When new diseases are added to the OIE list, they are now given an "N" prefix to maintain formatting.

The above NAHRS disease lists may also occasionally designate the same disease with different numbers in different years. This occurs when OIE splits a single disease reporting item into separate items, or vice-versa. For example, in 2006, OIE requested that Old World screwworm and New World screwworm be reported as a single line item, but in 2007, OIE split them into two separate reportable diseases. Numbering changes may also result when there is a lag between the time a new disease is added to the OIE list and before an official OIE number is assigned.

The NAHRS Steering Committee and National Surveillance Unit are also currently developing a U.S. National List of Reportable Diseases (NLRAD) that will provide a single, standardized list of diseases that must be reported in the U.S. More about the NLRAD...




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