title: First Robinsoniella peoriensis aortic cross homograft mycotic pseudoaneurysm: A case report and review of the literature.
abstract: Mycotic aortic aneurysm is a rare and challenging complication of aortic homografts caused by an infection and is associated with high morbidity and mortality. We report the first case of an aortic cross homograft mycotic pseudoaneurysm caused by Robinsoniella peoriensis in a 70-year-old man. Our patient underwent surgery for a recurrence of aortic cross mycotic pseudoaneurysm at the level of the aortic homograft he had had 7 years before. A clot-removal of the pseudoaneurysm was surgically carried out and the homograft was completely removed. Anaerobic culture from tissue samples yielded pure growth of a spore-forming Gram-positive rod, identified later as Robinsoniella peoriensis by 16S rRNA gene sequencing. The patient was then discharged with oral clindamycin according to the in vitro susceptibility testing. Identification of R. peoriensis might be challenging in clinical laboratories with no access to molecular methods.
authors.affiliation: Cliniques Universitaires St. Luc, Internal Medicine and Infectious Diseases Department, Avenue Hippocrate 10, 1200 Brussels, Belgium. Electronic address: hellibi@hotmail.com.
authors.forename: H
authors.initials: H
authors.lastname: Mertes
authors.affiliation: Cliniques Universitaires St. Luc, Clinical Microbiology Department, Avenue Hippocrate 10, 1200 Brussels, Belgium.
authors.forename: L
authors.initials: L
authors.lastname: Defourny
authors.affiliation: Cliniques Universitaires St. Luc, Clinical Microbiology Department, Avenue Hippocrate 10, 1200 Brussels, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Tré-Hardy
authors.affiliation: Cliniques Universitaires St. Luc, Nuclear Medicine Department, Avenue Hippocrate 10, 1200 Brussels, Belgium.
authors.forename: R
authors.initials: R
authors.lastname: Lhommel
authors.affiliation: Cliniques Universitaires St. Luc, Cardiovascular Surgery Department, Avenue Hippocrate 10, 1200 Brussels, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: El Khoury
authors.affiliation: Cliniques Universitaires St. Luc, Clinical Microbiology Department, Avenue Hippocrate 10, 1200 Brussels, Belgium.
authors.forename: H
authors.initials: H
authors.lastname: Rodriguez-Villalobos
authors.affiliation: Cliniques Universitaires St. Luc, Internal Medicine and Infectious Diseases Department, Avenue Hippocrate 10, 1200 Brussels, Belgium.
authors.forename: L
authors.initials: L
authors.lastname: Belkhir
mesh_terms: D000368:Aged; D064591:Allografts / Q000000981:diagnostic imaging / Q000473:pathology*; D017541:Aneurysm, False / Q000000981:diagnostic imaging / Q000209:etiology* / Q000382:microbiology / Q000473:pathology; D001018:Aortic Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000382:microbiology / Q000473:pathology; D000068016:Eubacteriales / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D016908:Gram-Positive Bacterial Infections / Q000175:diagnosis* / Q000382:microbiology / Q000473:pathology; D006801:Humans; D008297:Male; D000072078:Positron Emission Tomography Computed Tomography; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S
keywords: 16S rRNA gene sequencing; Aortic homograft; Mycotic pseudoaneurysm; Robinsoniella peoriensis