1. Norwegian School of Veterinary Science; Department of Sheep and Goat Research; Kyrkjevegen 332/334 N-4325 Sandnes Norway
2. Section of Wildlife Diseases; National Veterinary Institute; PO Box 8156 N-0033 Oslo Norway
3. Norwegian Red Deer Center; N-6914 Svanoybukt Norway
4. National Veterinary Institute; Department of Bacteriology; PO Box 7073 S-75007 Uppsala Sweden