title: Examining the occurrence of residues of flunixin meglumine in cull dairy cows by use of the flunixin cull cow survey.
abstract: OBJECTIVE
  To determine whether cull dairy cows with signs of certain clinical conditions, termed suspect, are more likely than healthy-appearing cull dairy cows to have violative concentrations of flunixin meglumine in their tissues at slaughter.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  961 cull dairy cows.
  
  
  METHODS
  Suspect cull dairy cows were selected from 21 beef slaughter establishments with a high production volume of dairy cows, and kidney and liver tissues were collected for screening. Kidney tissues were screened for antibiotics and sulfonamides with the fast antimicrobial screening test (FAST). Liver tissues were screened for flunixin meglumine with an ELISA, and quantitative analysis of ELISA-positive samples was performed with high-performance liquid chromatography. During the same time period, liver tissues from 251 healthy-appearing cull dairy cows were collected for the Food Safety and Inspection Service National Residue Program Scheduled Sampling Plan, but were screened only for flunixin meglumine.
  
  
  RESULTS
  Of 710 suspect cull dairy cows, 50 (7.04%) had liver tissue flunixin concentrations higher than the flunixin tolerance concentration (0.125 ppm). Thirty-one of 168 (18.45%) FAST-positive and 19 of 542 (3.51%) FAST-negative suspect cull dairy cows had violative tissue flunixin concentrations. Two of the 251 (0.80%) healthy-appearing cull dairy cows had violative tissue flunixin concentrations.
  
  
  CONCLUSIONS
  Suspect cull dairy cows, especially those that were also FAST positive, had a significantly higher incidence of violative tissue flunixin concentrations than healthy-appearing cull dairy cows at slaughter. Targeted sampling plans for flunixin meglumine in suspect dairy cows can help to support more efficient use of resources and further safeguard the nation's food supply.
authors: Office of Public Health Science, USDA FSIS, 1400 Independence Ave SW, Washington, DC 20250, USA.
authors: Cynthia L
authors: CL
authors: Deyrup
authors: Kristal J
authors: KJ
authors: Southern
authors: Julie A
authors: JA
authors: Cornett
authors: Craig E
authors: CE
authors: Shultz
authors: Deborah A
authors: DA
authors: Cera
mesh_terms: D000003:Abattoirs; D000818:Animals; D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry*; D002417:Cattle; D003002:Clonixin / Q000031:analogs & derivatives* / Q000737:chemistry; D003430:Cross-Sectional Studies; D004350:Drug Residues; D005260:Female; D007668:Kidney / Q000737:chemistry; D008099:Liver / Q000737:chemistry
chemical_list: D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; C014558:flunixin meglumine; D003002:Clonixin