Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Evaluation of Copper Supplementation to Control Haemonchus contortus Infections of Sheep in Sweden. | Acta vet. scand. 2004 45 149-160. Evaluation of Copper Supplementation to Control Haemonchus contortus Infections of Sheep in Sweden By P J. Waller1 G. Bernes2 L. Rudby-Martin3 . Ljungstrom4 and A. Rydzik1 department of Parasitology SWEPAR National Veterinary Institute and Swedish University of Agricultural Sciences Uppsala department of Agricultural Research for Northern Sweden Swedish University of Agricultural Sciences Umea 3Svenska Djurhalsovarden AB SvDHV Kăvlinge and 4Vidilab Enkõping Sweden. Waller PJ Bernes G Rudby-Martin L Ljungstrom BL and Rydzik A Evaluation of copper supplementation to control Haemonchus contortus infections of sheep in Sweden. Acta vet. scand. 2004 45 149-160. - A pen study was conducted to assess the effect of providing daily copper mineral supplement or copper wire particle COWP capsules on established or incoming mixed nematode infections in young sheep. For lambs with established 6 week old infections COWP resulted in 97 and 56 reduction of the adult and early L4 stages of H. contortus respectively compared with controls p . Additionally there was a 74 reduction in Teladorsagia circumcincta infections in the COWP lambs compared with controls p . However no effect was observed when COWP were given at the commencement of a larval dosing period of 6 weeks. There was no significant effect of copper mineral supplement given at the recommended rate to prevent Cu deficiency on either established or developing parasite infections. In addition a field trial was conducted on a commercial farm to assess the effects of COWP in the management of recurrent H. contortus infections but lack of parasites during the grazing season prevented an adequate assessment from being made. These results indicate that there is little if any benefit from a parasite control standpoint in recommending copper therapy specifically to control parasites in Swedish sheep flocks. helminth sheep copper organic production Sweden Introduction Recently a .
