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BSE Ongoing Monthly Surveillance Program

Last Modified: Sep 1, 2022
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Public and animal health are protected from BSE by a stringent feed ban imposed by the Food and Drug Administration in 1997 and by the removal of all specified risk material which could harbor BSE. USDA also has a strong ongoing surveillance program in place to detect signs of BSE in cattle in the United States. The program samples approximately 25,000 animals each year and targets cattle populations where the disease is most likely to be found. The targeted population for ongoing surveillance focuses on cattle exhibiting signs of central nervous disorders or any other signs that may be associated with BSE, including cattle that cannot walk, are low-weight, injured, or dead. These types of cattle are sampled at farms, veterinary diagnostic laboratories, public health laboratories, slaughter facilities, veterinary clinics, and livestock markets.

BSE August 2022 samples collected

Current Monthly Test Results

APHIS reports ongoing surveillance test totals monthly.

Collection Month

FY2022

Number of Valid Samples

OIE Points

October 2021 1,552 31,156
November 2021 2,383 41,777
December 2021 2,138 36,993
January 2022 1,843 50,991
February 2022 2,120 55,165
March 2022 2,854 40,081
April 2022 2,416 40,380
May 2022 2,188 22,358
June  2022 1,723 23,203
July 2022 1,113 10,627
August 2022 958 4,589

Total as of September 1, 2022

 21,288 357,320

Beginning in Fiscal Year 2016, the BSE ongoing surveillance program will sample approximately 25,000 animals each year. Under the program, USDA will continue to collect samples from a variety of sites and from the cattle populations where the disease is most likely to be detected.

Fiscal Year 2007-2016 Test Results

For Fiscal Years 2007-2015, the BSE ongoing surveillance program had a target of testing approximately 40,000 animals per year.

OIE Surveillance Points: design prevalence of 1 case per 100,000 U.S. adult cattle and 95% confidence; 300,000 OIE points over 7 years, or 42,857 OIE points on average per year are required.

BSurvE Surveillance Points: design prevalence of 1 case per 1,000,000 U.S. adult cattle and 95% confidence; 3,000,000 points over 7 years, or 428,571 BSurvE points on average per year are required.

Samples Tested, OIE Points, and BSurvE Points by Fiscal Year

Fiscal Year

Total Samples
Tested as Valid

OIE Points per FY 

BSurvE Points

FY2012 42,202 1,066,637 2,523,447
FY 2013 43,173 1,048,554 2,505,042
FY 2014 41,291 678,622 1,642,452
FY 2015 40,902 592,353 1,414,630
FY 2016 26,564 547,959 1,314,579
FY 2017 24,229 577,494 1,383,678
FY 2018 21,809 540,960 1,305,585
FY 2019 18,627 395,732 948,602
FY 2020 21,441 331,561 795,183
FY2021 23,124 398,508 962,010

BSE Ongoing Surveillance Program Cumulative Totals

  • Valid Tests from September 1, 2006 to September 1, 2022: 538,020
  • OIE Points from September 1, 2006 to September 1, 2022: 12,054,188
  • BSurvE Points from September 1, 2006 to September 1, 2022: 28,770,699

(see "BSE Ongoing Surveillance Plan" for information on OIE and BSurvE points)

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