tailieunhanh - Báo cáo khoa học: "Investigations of Waterborne Pathogens in Eurasian Beaver (Castor fiber) from Telemark County, Southeast Norway"

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: Investigations of Waterborne Pathogens in Eurasian Beaver (Castor fiber) from Telemark County, Southeast Norway. | Acta vet. scand. 2001 42 479-482. Brief Communication Investigations of Waterborne Pathogens in Eurasian Beaver Castorfiber from Telemark County Southeast Norway By F Rosell1 2 O. Rosef1 and H. Parker1 department of Environmental and Health Studies Faculty of Arts and Sciences Telemark University College Telemark and department of Zoology Norwegian University of Science and Technology Trondheim Norway. The presence of pathogenic bacteria and parasites in drinking water is a well-known cause of human disease outbreaks Isaac-Renton Cordeiro 1993 Koenraad et al. 1997 . There is however a lack of knowledge of the contamination routes to water. In Norway the supply of drinking water to the public and the food industry is primarily based on chlorinated surface water. Since the Eurasian beaver Castor fiber has a widespread distribution in southern Norway Nolet Rosell 1998 and lives in water it may excrete pathogens into drinking water sources. The present study was carried out to examine whether beaver in Norway might be a reservoir of parasites belonging to the protozoan genera Giardia and Cryprosporidium or bacteria of the genera Campylobacter and Salmonella. Flagellates of the genus Giardia are common intestinal parasites of many mammals and are considered the most common cause of waterborne gastroenteritis in North America Er-landsen et al. 1996 . Giardia cysts are frequently found in Norwegian surface water sources Gjerde 2000 and the number of reported human cases of giardiasis is rising here Anon. 1998 1999 . In the USA the preva lence of Giardia infection in beaver C. canadensis has been reported to be 7-16 Er-landsen et al. 1990 and the beaver is considered a potential health threat if inhabiting watersheds used as sources of drinking water Erlandsen et al. 1996 . The parasite is resistant to chlorination Moorehead et al. 1990 . Cryptosporidium spp. are coccidian parasites causing intestinal infections in a wide range of mammals including man O Donoghue 1995 .