Section 556.226 - Enrofloxacin(a)Acceptable daily intake (ADI). The ADI for total residue of enrofloxacin is 3 [MICRO]g/kg of body weight per day.(b)Tolerances. The tolerances for enrofloxacin are: (1)Cattle. Liver (target tissue): 0.1 ppm desethylene ciprofloxacin (marker residue).(2)Swine. Liver (target tissue): 0.5 ppm enrofloxacin (marker residue).(c)Related conditions of use. See §§ 516.812 and 522.812 of this chapter. 84 FR 32993 , July 11, 2019, as amended at 86 FR 13188 , Mar. 8, 2021 84 FR 32993, 9/9/2019; as amended at 86 FR 13188, 3/8/2021