Abstract
Biochemical, genomic, and serological data indicate that strains currently referred to as Listeria monocytogenes serovar 5 are sufficiently distinct from other species of the genus Listeria to merit separate species status. It is proposed that these strains be designated Listeria ivanovii sp. nov. The type strain of L. ivanovii is strain SLCC 2379 (= ATCC 19119).