tailieunhanh - Báo cáo khoa học: "Persistence of Granulocytic Ehrlichia Infection During Wintertime in Two Sheep Flocks in 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: Persistence of Granulocytic Ehrlichia Infection During Wintertime in Two Sheep Flocks in Norway. | Acta vet. scand. 2001 42 347-353. Persistence of Granulocytic Ehrlichia Infection During Wintertime in Two Sheep Flocks in Norway By 5. Stuen1 R. Djuve2 and K. Bergstrom3 Norwegian School of Veterinary Science Department of Sheep and Goat Research Sandnes Norway department of Clinical Studies Internal Medicine The Royal Veterinary and Agricultural University Frederiks-berg Denmark and 3National Veterinary Institute Department of Bacteriology Uppsala Sweden. Stuen S Djuve R Bergstrom K Persistence of granulocytic Ehrlichia infection during wintertime in two sheep flocks in Norway. Acta vet. scand. 2001 42 347353. - Granulocytic Ehrlichia infection in sheep is common in Norway in areas with Ixodes ricinus. In this study 2 sheep flocks that had been grazing on I. ricinus infested pastures the previous season were blood sampled after being housed indoors for nearly 6 months during wintertime. Thirty animals from each flock were examined for granulocytic Ehrlichia infection in the peripheral blood by blood inoculation studies stained blood smear evaluation polymerase chain reaction PCR analysis and serology IFA-antibodies . The animals were sampled twice within a three-week period the first time before and the second time after lambing. Two sheep in one flock were found Ehrlichia positive by both blood smear evaluation and PCR before lambing and 3 sheep were found positive after lambing 2 by blood smear examination and 3 by PCR. In the other flock no sheep was found infected before lambing but 2 ewes were found positive after lambing by both blood smear evaluation and PCR. In the first flock 87 of the animals were found seropositive before lambing and the mean antibody titre log10 SD to E. equi was . In the second flock 40 were found seropositive before lambing and the mean antibody titre was . Seroprevalence and mean antibody titre in these 2 flocks were significantly different p . The present study indicates that sheep may be a reservoir host