This transmission electron micrograph (TEM), photographed at the Centers for Disease Control in Atlanta, Georgia, confirmed the suspicion that the 1975 Rhodesian (now Zimbabwean) hemorrhagic fever patient had indeed acquired the Marburg virus while traveling through that country. Note that in this particular section, the cylindrical Marburg virions were sectioned in various planes, which is why some are seen as longitudinal sections, i.e., lengthwise, while others are seen cut in a transaxial plane, i.e., cross-sectioned, and look circular.

Picture & text from CDC/PHIL. For more information see Marburg Virus Pictures from CDC