ACINETOBACTER BAUMANNII. ACINETOBACTER BAUMANNII This SEM depicts a number of Gram-negative, non-motile Acinetobacter baumannii bacteria, Mag: 12365x. Members of the genus Acinetobacter are nonmotile rods, 1.0-1.5µm in diameter, and 1.5-2.5µm in length, becoming spherical during their stationary growth phase, theyre widely distributed in nature, and are normal flora on the skin. Some members of the genus are important because they are an emerging cause of hospital acquired pulmonary, i.e., p