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Case Reports in Pulmonology
Volume 2016 (2016), Article ID 5134969, 3 pages
Case Report

Community-Acquired Moraxella catarrhalis Bacteremic Pneumonia: Two Case Reports and Review of the Literature

Hospital Universitario Central de Asturias (HUCA), Instituto Nacional de Silicosis (INS), Área del Pulmón, Facultad de Medicina, Universidad de Oviedo, 33005 Oviedo, Spain

Received 4 January 2016; Accepted 2 February 2016

Academic Editor: Fabio Midulla

Copyright © 2016 Miguel Angel Ariza-Prota et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Moraxella (formerly Branhamella) catarrhalis was discovered at the end of the nineteenth century, and for many decades it was considered to be a harmless commensal of the upper respiratory tract. It is a Gram-negative, aerobic diplococcus considered to be the third most common pathogen isolated in childhood sinusitis and otitis media and in adult chronic lower respiratory disease, as well as an etiological agent of pneumonia in immunosuppressed patients or those with chronic obstructive pulmonary disease. Moraxella catarrhalis pneumonia is rarely associated with bacteremia. Here, we present two cases of community-acquired Moraxella catarrhalis bacteremic pneumonia.