Relative Deposition of the Anthelmintic Tetramisole in Eggs and Poultry Tissues

Acquired resistance to experimental Heterakis gallinarum infections in pheasants: Relative immunity conferred by exposure to heterakids of different ages

“…Because the donor pheasants had been fed the same inoculum as that used for the immunizing and challenge doses and because only 7 % of the larvae recovered from the donors were lost during the transfer procedure, the average of 119 10-day-old larvae transferred per recipient should represent approximately the number present in the other lots at 10 days after inoculation. Although tetramisole at 40 mg/kg apparently leaves no drug residues (Allewijn and Marsboom, 1967), we considered it advisable to administer the drug to the birds of Lot V before they were given the challenge control dose. Birds in Lot I were killed 49 days after receiving the immunizing control dose; birds in Lots II, III, and IV, 49 days after the immunizing dose (21 days after the challenge dose); and birds in Lot V, 21 days after the challenge control dose.…”