date:Jun 24, 2014
d Inspection Service (USDA/FSIS) analysis of tissue samples collected from this animal identified the presence of 6.28 parts per million (ppm) of desfuroylceftiofur (marker residue for ceftiofur) in the kidney and 0.879 ppm of flunixin in the liver.
As explained in the letter, FDA has established a tolerance of 0.4 ppm for residues of desfuroylceftiofur in the kidney tissue of cattle as codified in Title 21, Code of Federal Regulations (C.F.R.), Section 556.113(b)(3)(i) (21C.F.R. 556.113(b)(3)(