Bordetella pertussis

…is caused by the bacterium Bordetella pertussis.

…μm in length; the rod-shaped Bordetella pertussis, which is the causative agent of whooping cough, ranging from 0.2 to 0.5 μm in diameter and 0.5 to 1 μm in length; and the corkscrew-shaped Treponema pallidum, which is the causative agent of syphilis, averaging only 0.1 to 0.2 μm in diameter…

…the bacterium, now known as Bordetella pertussis, that is responsible for whooping cough, Bordet became professor of bacteriology at the Free University of Brussels (1907–35).