listeria rocourtiae listeria rocourtiae listeria rocourtiae is a species of bacteria. it is a gram-positive, facultatively anaerobic, motile, non-spore-forming bacillus. it is non-pathongenic and non-hemolytic. the species was first isolated from pre-cut lettuce in salzburg, austria in 2002. it is named in honor of jocelyne rocourt, "whose work had a major impact on the taxonomy of the genus listeria." listeria rocourtiae scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: listeriaceae genus: listeria species: l. rocourtiae binomial name listeria rocourtiaeleclercq et al. 2010