Affiliation: | (1) Department of Production Animal Clinical Sciences, Section of Small Ruminant Research, Norwegian School of Veterinary Science, N-4325 Sandnes, Norway;(2) Department of Basic Sciences and Aquatic Medicine, Norwegian School of Veterinary Science, N-0033 Oslo, Norway;(3) National Veterinary Institute, 75189 Uppsala, Sweden;(4) Department of Pathology, Division of Medical Microbiology, The Johns Hopkins Hospital, 21205 Baltimore, MD, USA |