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: Disintegration of Dung Pats from Cattle Treated with the Ivermectin Anthelmintic Bolus, or the Biocontrol Agent Duddingtonia flagrans. | Acta vet. scand. 2003 44 171-180. Disintegration of Dung Pats from Cattle Treated with the Ivermectin Anthelmintic Bolus or the Biocontrol Agent Duddingtonia flagrans By . Dimander J. Haglund and P J. Waller Department of Parasitology SWEPAR National Veterinary Institute and Swedish University of Agricultural Sciences Uppsala Sweden. Dimander S-O Hoglund J Waller P. J Disintegration of dung pats from cattle treated with the ivermectin anthelmintic bolus or the biocontrol agent Duddingto-nia flagrans. Acta vet. scand. 2003 44 171-180. - An experiment was performed during the grazing seasons of 1998 1999 and 2000 to study the influence of the antipara-sitic drug ivermectin and the nematophagous fungus Duddingtonia flagrans on cattle dung disintegration. The faeces originated from groups of animals that were part of a separate grazing experiment where different control strategies for nematode parasite infections were investigated. Each group consisted of 10 first-season grazing cattle that were either untreated treated with the ivermectin sustained-release bolus or fed chlamydospores of D. flagrans. Faeces were collected monthly on 4 occasions and out of pooled faeces from each group 4 artificial 1 kg dung pats were prepared and deposited on nylon mesh on an enclosed pasture and protected from birds. The position of the new set of pats was repeated throughout the 3 years of the study. Each year the dung pats were weighed 4 6 8 and 10 weeks after deposition and immediately afterwards replaced to their initial positions. Results showed that there was no difference in faecal pat disintegration between groups. However the time-lag between deposition and complete disintegration of the faeces varied significantly between deposition occasions. Dung pats disappeared within 2 weeks visual observation when subjected to heavy rainfall early after deposition whereas an extended dry period coincided with faeces still remaining 12 months after deposition. cattle faecal pat .
