McCaughey W J
Veterinary Research Laboratories, Stormont, Belfast, Northern Ireland.
Vet Rec. 1988 Nov 12;123(20):511-3. doi: 10.1136/vr.123.20.511.
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.
