Hypersensitivity reactions to reindeer epithelial (RE) allergens have been recently demonstrated among reindeer herders. To determine the concentration of airborne RE antigens a method based on inhibition of the enzyme-linked immunosorbent assay (ELISA) was developed. Dust samples were collected in workshops where reindeer leather was processed and the workers had inhaled dry epithelial dust during their working shifts. Specific IgE to RE allergen could be detected in one of 5 workers. RE antigen concentrations varied from 0.01 microgram to 3.9 micrograms/m3 in the air of the workshop. All workers except one claimed work-associated respiratory symptoms.
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Microanatomy of incremental growth lines in dental tissues in reindeer Rangifer tarandus.
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Centre for Saami Studies, UiT the Arctic University of Norway, Tromsø, Norway.
Counting growth layers in dentine and/or secondary cementum is widely used for age determination in wild mammals but the underlying seasonal changes in the structure and degree of mineralisation of dental tissue have not been well characterised. We embedded first (m1) and second (m2) mandibular permanent molar teeth from a 12-year-old female Svalbard reindeer (Rangifer tarandus platyrhynchus) in PolyMethylMethAcrylate (PMMA), prepared cut and polished surfaces coated with evaporated carbon and used 20 kV back-scattered electron imaging in a scanning electron microscope (BSE-SEM) to study aspects of dental tissue structure which depend on the degree of mineralisation at the micron and sub-micron scale. BSE-SEM revealed differences between the mineral content of growth layers (annulations) in the secondary cementum and the primary and secondary dentine, the latter, incidentally, still forming at death in m1.
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Section of Arctic Veterinary Medicine, Department of Food Safety and Infection Biology, The Norwegian School of Veterinary Science, NO-9010 Tromsø, Norway.
Contagious ecthyma (contagious pustular dermatitis, orf) occurs world-wide in sheep and goats and is caused by orf virus (genus Parapoxvirus, family Poxviridae). Contagious ecthyma outbreaks have been described in semi-domesticated reindeer (Rangifer tarandus tarandus) in Sweden, Finland and Norway, occasionally with high mortality. Fourteen one-year-old reindeer were corralled in mid-April.
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Department of Clinical Veterinary Sciences, Faculty of Veterinary Medicine, University of Helsinki, Pohjoinen pikatie 800, FIN-04920, Saarentaus, Finland.
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Invest Ophthalmol Vis Sci
January 2003
Eye Department, National Hospital, University of Oslo, Sognvannsveien 20, NO-0027 Oslo, Norway.
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Usp Fiziol Nauk
November 2002
Institute of Physiology, Komi Science Centre, Ural Division of the RAS, Syktyvkar.
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