title: A psoas abscess caused by Propionibacterium propionicum.
abstract: Pelvic actinomycosis-like disease due to Propionibacterium propionicum has been very rare and only a few cases have been reported in the literature. We herein report a probable first case of a psoas abscess caused by P. propionicum. Since P. propionicum is indistinguishable from Actinomyces israelii by morphological features or routine biochemical tests, 16S rRNA gene sequencing was useful to discriminate these two species in this case.
authors.affiliation: Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan.
authors.forename: Shota
authors.initials: S
authors.lastname: Yonetani
authors.affiliation: Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan. Electronic address: onishi@ks.kyorin-u.ac.jp.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Ohnishi
authors.affiliation: Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Araki
authors.affiliation: Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Hiroi
authors.affiliation: Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Takagi
authors.affiliation: Department of Orthopedic Surgery, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Ichimura
authors.affiliation: Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Watanabe
mesh_terms: D005260:Female; D016908:Gram-Positive Bacterial Infections / Q000150:complications*; D006801:Humans; D008875:Middle Aged; D011424:Propionibacterium / Q000302:isolation & purification*; D016659:Psoas Abscess / Q000382:microbiology*
keywords: 16S rRNA; Actinomycosis-like disease; Spider-form colonies