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- Title
Urinary tract infection caused by a small colony variant form of capnophilic Escherichia coli leading to misidentification and non-reactions in antimicrobial susceptibility tests.
- Authors
Park, Yu Jin; Le Phuong, Nguyen; Pinto, Naina Adren; Kwon, Mi Jeong; D'Souza, Roshan; Byun, Jung-Hyun; Sung, Heungsup; Yong, Dongeun
- Abstract
Background: Small colony and capnophilic variant cases have been separately reported, but there has been no reports of their simultaneous presence in one isolate. We report a case of Escherichia coli with coexpressed small colony and capnophilic phenotypes causing misidentification in automated biochemical kits and non-reactions in antimicrobial susceptibility test cards. Case presentation: An 86-year-old woman developed urinary tract infection from a strain of Escherichia coli with SCV and capnophilic phenotypes in co-existence. This strain did not grow without the presence of CO2, and therefore proper identification from automated system was not possible. 16 s rRNA sequencing and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was able to identify the bacteria. Conclusion: As these strains do not grow on culture parameters defined by CLSI or on automated systems, proper identification using alternative methods are necessary.
- Subjects
URINARY tract infections; ESCHERICHIA coli; MICROBIAL sensitivity tests
- Publication
Antimicrobial Resistance & Infection Control, 2018, Vol 7, Issue 1, pN.PAG
- ISSN
2047-2994
- Publication type
Article
- DOI
10.1186/s13756-018-0438-6