The Brazilian Journal of Infectious Diseases The Brazilian Journal of Infectious Diseases
Case report
Bacteremia due to Moraxella osloensis: a case report and literature review
Yuta Maruyamaa, Tomonari Shigemurab,, , Koki Aoyamac, Noriyuki Naganod, Yozo Nakazawab
a Shinshu Ueda Medical Center, Department of Pediatrics, Ueda, Japan
b Shinshu University, School of Medicine, Department of Pediatrics, Matsumoto, Japan
c Kofu Municipal Hospital, Department of Pediatrics, Kofu, Japan
d Shinshu University, School of Medicine, Department of Health and Medical Sciences, Matsumoto, Japan
Received 04 September 2017, Accepted 24 October 2017
Abstract

Herein we report the case of a 10-year-old boy with an autosomal mosaic mutation who developed bacteremia. The causative agent was identified as Moraxella osloensis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 16S rRNA gene sequencing. In the pediatric population, there have been 13 case reports of infection attributed to M. osloensis and this is the fifth reported case of pediatric bacteremia due to M. osloensis. After Moraxella species infection was confirmed, the patient recovered with appropriate antimicrobial therapy. It is important to consider that M. osloensis can cause serious infections, such as bacteremia, in otherwise healthy children.

Keywords
Moraxella osloensis, Bacteremia, MALDI-TOF MS, 16S rRNA gene sequencing