O. F. Müller (1773, 1786) described eight species of the genus "Vibrio" (included in Infusoria), three of which were spirilliforms. Some of the other species are today assigned to eukaryote taxa, e.g., to the euglenoid "Peranema" or to the diatom "Bacillaria". However, "Vibrio" Müller, 1773 became regarded as the name of a zoological genus, and the name of the bacterial genus became "Vibrio" Pacini, 1854. Filippo Pacini isolated micro-organisms he called "vibrions" from cholera patients in 1854, because of their motility.