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Báo cáo khoa học: "Combining information from surveys of several species to estimate the probability of freedom from Echinococcus multilocularis in Sweden, Finland and mainland Norway"

Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú yđề tài: Combining information from surveys of several species to estimate the probability of freedom from Echinococcus multilocularis in Sweden, Finland and mainland Norway. | Wahlstrom et al. Acta Veterinaria Scandinavica 2011 53 9 http www.actavetscand.eom content 53 1 9 AVS ACTAVETERINARIA SCANDINAVICA RESEARCH Open Access Combining information from surveys of several species to estimate the probability of freedom from Echinococcus multilocularis in Sweden Finland and mainland Norway Helene Wahlstrom1 Marja Isomursu2 Gunilla Hallgren1 Dan Christensson1 Maria Cedersmyg3 Anders Wallensten4 Marika Hjertqvist4 Rebecca K Davidson5 Henrik Uhlhorn1 Petter Hopp5 Abstract Background The fox tapeworm Echinococcus multilocularis has foxes and other canids as definitive host and rodents as intermediate hosts. However most mammals can be accidental intermediate hosts and the larval stage may cause serious disease in humans. The parasite has never been detected in Sweden Finland and mainland Norway. All three countries require currently an anthelminthic treatment for dogs and cats prior to entry in order to prevent introduction of the parasite. Documentation of freedom from E. multilocularis is necessary for justification of the present import requirements. Methods The probability that Sweden Finland and mainland Norway were free from E. multilocularis and the sensitivity of the surveillance systems were estimated using scenario trees. Surveillance data from five animal species were included in the study red fox Vulpes vulpes raccoon dog Nyctereutes procyonoides domestic pig wild boar Sus scrofa and voles and lemmings Arvicolinae . Results The cumulative probability of freedom from EM in December 2009 was high in all three countries 0.98 95 CI 0.96-0.99 in Finland and 0.99 0.97-0.995 in Sweden and 0.98 0.95-0.99 in Norway. Conclusions Results from the model confirm that there is a high probability that in 2009 the countries were free from E. multilocularis. The sensitivity analyses showed that the choice of the design prevalences in different infected populations was influential. Therefore more knowledge on expected prevalences for E. .