tailieunhanh - Báo cáo khoa học: "Salmonella in Sheep in Iceland"

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: Salmonella in Sheep in Iceland. | Acta vet. scand. 2002 43 43-48. Salmonella in Sheep in Iceland By 5. Hjartardóttir1 E. Gunnarsson1 and J. Sigvaldadóttir2 Institute for Experimental Pathology University of Iceland Keldur and 2Chief Veterinary Office Iceland. Hjartardottir S Gunnarsson E Sigvaldadóttir J Salmonella in sheep in Iceland. Acta vet. scand. 2002 43-48. - In 1995 several outbreaks of food poisoning in humans occurred in Iceland that were traced to salmonella contamination of singed sheep heads. This prompted us to study the prevalence of salmonella infection in sheep and to trace where and how infection might have occurred. Faecal intestinal contents and tonsillar samples were collected in the spring and autumn from sheep on 50 farms in the southwestern part of the country where salmonellosis had been detected and from 5 farms in the northwestern part of the country. All faecal samples from the southwest were negative whereas samples from 3 farms obtained in the autumn in the northwest were positive. Tonsillae taken in the autumn were positive in sheep from 3 farms in the southwest and 2 in the northwest. Our results show that salmonella infection is rare in Icelandic sheep but healthy carriers may harbour the bacteria in tonsillae. Salmonella was not detected in drainage from slaughterhouses nor in singed sheep heads. faeces food poisoning gull raven salmonella sheep tonsillae. Introduction Infection by salmonella is a common cause of food poisoning in humans Hobbs et al. 1989 . The genus Salmonella comprises approximately 2 200 serotypes and although infection by Salmonella typhimurium is the most common cause of food poisoning in Europe America and Australia S. enteritidis has exceeded those due to S. typhimurium in Britain Gilbert et al. 1990 . The severity of symptoms varies with the infecting serotype. Most patients recover after approximately 5 days but more serious illness can occur especially in children and elderly people Prescott et al. 1996 . Food-animals such as intensively