Proteus mirabilis and Proteus vulgaris are well known to be frequently involved in urinary tract infection pathologies and are also responsible for various systemic and localized infections. Hauser described the characteristic zonal growth of these two species, also called swarming Swarming motility is a rapid and coordinated translocation of a bacterial population across solid or semi-solid surfaces, and is an example of bacterial multicellularity and swarm behaviour.