Colorized light micrograph showing Haemophilus influenzae (Pfeiffer's bacillus). In its uncapsulated form it is can cause local infections such as otitis, sinusitis, pharyngitis, and conjunctivitis. Encapsulated strains can cause ear infections, meningitis, epiglottitis, occurring almost exclusively in children up to the age of six, as well as septicemia and pneumonia. Image colorization and HDRI treatments on microscopy; magnification: X1000.