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: Persistence of Trichinella spiralis in Rat Carcasses Experimentally Mixed in Different Feed. | Acta vet. scand. 2002 43 203-210. Persistence of Trichinella spiralis in Rat Carcasses Experimentally Mixed in Different Feed By L. Oivanen1 3 T. Mikkonen1 L. Haltia2 H. Karhula1 H. Saloniemi2 and A. Sukura1 department of Basic Veterinary Sciences and department of Clinical Veterinary Sciences Faculty of Veterinary Medicine University of Helsinki and National Veterinary and Food Research Institute Helsinki Finland. Oivanen L Mikkonen T Haltia L Karhula H Saloniemi H Sukura A Persistence of Trichinella spiralis in rat carcasses experimentally mixed in different feed. Acta vet. scand. 2002 43 203-210. - Trichinella spiralis infected rat carcasses were incubated for 6 weeks in several animal feeds to assess how long Trichinella can present a risk for an outbreak in contaminated feeds. In groups of 6 24 infected target rats were placed in silage grained barley propionic acid-preserved feed and also into simulated pasture conditions. Test environments were sampled after one- 2- 4- and 6-week-in-cubations. Trichinella larvae were recovered by digestion and their infectivity was evaluated in rats. A two-week incubation reduced the number of recovered larvae but still after 6 weeks low numbers were isolated from all feeds except from the experimental group simulating pasture conditions. After 2 weeks storage the larvae were infective in all storage environments. However up to 4 weeks they survived only in the propionic acid-fermented feed and there in small numbers with reduced reproductive capability. This indicates the possibility of farm animals to get infection from rats or other infected material being hazardously mixed with hay or other feed. If silage is stored for at least one month before use however the risk from this forage appears to be minimized. Trichinellosis domestic cycle exposure assessment feed hazard animal hygiene zoonosis disease control rat feed contamination carrion. Introduction Rodents have been suspected or proven to be a source of trichinellosis
