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1 Department of Veterinary Pathobiology, The Royal Veterinary and Agricultural University, Stigbøjlen 4, DK-1870 Frederiksberg C, Denmark
2 Center for Biological Sequence Analysis, BioCentrum-DTU, Technical University of Denmark, Building 208, DK-2800 Lyngby, Denmark
3 Department of Wildlife, The National Veterinary Institute, SE-751 89 Uppsala, Sweden
6 Corresponding author (email: miki{at}life.ku.dk)
ABSTRACT:
Eight atypical Mannheimia isolates were isolated from lesions in roe deer (Capreolus capreolus). Traditional classification based on morphologic and physiologic traits showed that they belong to a distinct biogroup (taxon) within genus Mannheimia. Extensive phenotypic characterization suggested that the isolates should be classified as M. granulomatis, although the presence of distinct traits justified their classification into a separate biogroup within this species. Phylogenetic analyses based on 16S rRNA sequences from two roe deer isolates and 41 other Mannheimia strains supported that the roe deer isolates form a monophyletic group within M. granulomatis. The lktA genotype was present in all roe deer isolates based on Southern blot analysis, whereas the corresponding ß-hemolytic phenotype was absent in one of these isolates.
Key words: ß-hemolytic phenotype, Capreolus capreolus, leukotoxin, Mannheimia granulomatis, roe deer.
4 These authors contributed equally to the present work.
5 Current address: Department of Veterinary Pathobiology, Faculty of Life Sciences, University of Copenhagen, 4 Stigbøjlen, DK-1870, Frederiksberg C, Denmark
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