J Pediatr Infect Dis 2020; 15(02): 107-109
DOI: 10.1055/s-0038-1639344
Case Report
Georg Thieme Verlag KG Stuttgart · New York

Moraxella osloensis Bacteremia in an Immunocompetent Child

Authors

  • Prashant Purohit

    1   Medical Microbiology Unit, Laboratory Medicine Department, Al-Sabah Hospital, Kuwait
  • Sherif Abdul Latif Sadek

    2   Department of Pediatrics, Al-Sabah Hospital, Kuwait
  • Komal Tak

    3   Medical Microbiology Unit, Laboratory Medicine Department, Chest Diseases Hospital, Kuwait
  • Maha Emara

    1   Medical Microbiology Unit, Laboratory Medicine Department, Al-Sabah Hospital, Kuwait
  • Ritu Bafna

    1   Medical Microbiology Unit, Laboratory Medicine Department, Al-Sabah Hospital, Kuwait
  • Ina'am Ahmad Al-Obaid

    1   Medical Microbiology Unit, Laboratory Medicine Department, Al-Sabah Hospital, Kuwait
  • Nazima Habibi

    4   Kuwait Institute for Scientific Research, Kuwait
  • Abu Salim Mustafa

    5   Department of Microbiology, Faculty of Medicine, Kuwait University, Kuwait
Further Information

Publication History

02 October 2017

06 February 2018

Publication Date:
16 March 2018 (online)

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Abstract

Moraxella osloensis has been reported in the literature as a rare cause of sepsis, central nervous system infection, chest infection, and endophthalmitis. In the present case, the organism was isolated from the blood of an 8-year-old immunocompetent boy. It could not be identified with VITEK-2 and API-20NE (bioMerieux SA, Marcy-l'Etoile, France). Latex-based bacterial antigen test (BD Directigen Meningitis Combo Test; Becton, Dickinson and Company, Sparks, Maryland, United States) was positive for Neisseria meningitidis A/Y. It was identified as M. osloensis using matrix-associated laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF) (Vitek MS, bioMerieux, Marcy-l'Etoile) (confidence level 99.9%) and 16S rRNA gene sequencing (99% sequence identity). The child responded well to ampicillin, and was discharged home after 4 days, on oral amoxicillin–clavulanic acid for the next 7 days. M. osloensis is a rare cause of bacteremia. It may masquerade as N. meningitidis in the routine tests performed in the routine microbiology laboratories. It is imperative to confirm the identification with MALDI-TOF or a molecular method to remove the false positive diagnosis of N. meningitidis, and to avoid the unnecessary use of prophylaxis with rifampicin or ciprofloxacin.