Detection of zeranol in the blood of ram lambs by a radioimmunoassay technique.
Plasma separated from jugular blood samples from six weaned ram lambs was examined for zeranol after the lambs had been implanted, behind the left ear, with a 12 mg pellet. The results showed that the ipsilateral vein contained significantly more zeranol for up to 100 days after implantation; by 145 to 175 days the difference between the ipsi- and contralateral veins was no longer significant. Massage of the implant site did not increase the rate of release of zeranol from the residual mass.
McCaughey
W J
WJ
Veterinary Research Laboratories, Stormont, Belfast, Northern Ireland.
D000818:Animals; D004343:Drug Implants; D008297:Male; D011863:Radioimmunoassay; D012118:Resorcinols / Q000097:blood*; D012756:Sheep / Q000097:blood*; D015029:Zeranol / Q000008:administration & dosage / Q000097:blood*
D004343:Drug Implants; D012118:Resorcinols; D015029:Zeranol