DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Moraxella catarrhalis, gram-negative, aerobic, oxidase-positive, diplococcus bacterium. Moraxella catarrhalis, formerly known as Branhamella catarrhalis, may colonize and cause respiratory tract infections in humans. M. catarrhalis has been implicated in a variety of infections, including: bronchitis, sinusitis, laryngitis, bronchopneumonia and otitis media. M. osloensis is another species that is pathogenic in humans. Magnification: x2,000 when shortest axis printed at 25 millimetres.
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