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Bernard K, Pacheco AL, Cunningham I, Gill N, Burdz T, Wiebe D. Emendation of the description of the species
Corynebacterium propinquum
to include strains which produce urease. Int J Syst Evol Microbiol 2013; 63:2146-2154. [DOI: 10.1099/ijs.0.046979-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Corynebacterium propinquum
is a Gram-positive rod occasionally recovered from clinical infections which, according to 16S rRNA gene sequencing, is most closely related (>99 % sequence similarity) to
Corynebacterium pseudodiphtheriticum
. The two species are very similar biochemically, commonly differentiated by a single test, the detection of urease, where strains of
C. propinquum
are described as being urease-non-producing and strains of
C. pseudodiphtheriticum
are described as urease-producing. In this study, historical and contemporary strains of
C. propinquum
and
C. pseudodiphtheriticum
from this laboratory were definitively characterized, which included use of rpoB sequencing. Urease-producing strains of
C. propinquum
as well as typical urease-non-producing isolates were identified after rpoB sequencing, with six of these being originally identified as
C. pseudodiphtheriticum
. Based on these observations, we propose emendation of the description of
C. propinquum
to include strains which produce urease. MALDI-TOF analysis may be a useful tool to differentiate these taxa. Existing commercial databases should be updated to include urease-positive strains of
C. propinquum
.
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Affiliation(s)
- Kathryn Bernard
- University of Manitoba, Department of Medical Microbiology, Winnipeg, Manitoba, Canada
- Special Bacteriology Unit, ARNI, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Ana Luisa Pacheco
- Special Bacteriology Unit, ARNI, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Ian Cunningham
- University of Manitoba, Department of Medical Microbiology, Winnipeg, Manitoba, Canada
| | - Navdeep Gill
- University of Victoria, Department of Biochemistry and Microbiology, Victoria, British Columbia, Canada
| | - Tamara Burdz
- Special Bacteriology Unit, ARNI, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Deborah Wiebe
- Special Bacteriology Unit, ARNI, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
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