Abstract
ABSTRACT Background Lawsonella clevelandensis is a recently characterized fastidious anaerobic Gram-positive, partially acid-fast bacillus associated with monomicrobial abscess formation. Case Summary This case report features a 56-year-old female who developed right breast pain and was found to have subareolar breast abscess. Aspiration of the abscess grew pinpoint to small waxy colonies within 5 days on phenylethyl alcohol agar under anaerobic conditions. The organism was maintained with sustained growth from a subculture in thioglycolate broth. Conventional identification techniques, including matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, failed to identify the organism, which was confirmed as L. clevelandensis by 16S rDNA sequencing. Conclusion This case marks the fifth reported case of L. clevelandensis as the causative organism of monomicrobial breast abscess. Additionally, this case marks the first reported instance of L. clevelandensis being maintained and cultivated within liquid-based growth media.
Published Version
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