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Assignment of Listeria grayi and Listeria murrayi to a Single Species, Listeria grayi, with a Revised Description of Listeria grayi

¹Centre National de Référence pour la Lysotypie et le Typage Moléculaire de Listeria and WHO Collaborating Center for Foodborne Listeriosis, Département de Bactériologie-Mycologie
³Unité des Entérobacteries, Centre National de Référence pour le Typage Moléculaire Entérique, Unité INSERM 199
²Institut Pasteur, 28 rue du Dr Roux, 75724 Paris, Cedex 15, France, and Istituto Cantonale Batteriologico, 6904 Lugano, Switzerland

^* Corresponding author.

ABSTRACT

The genomic relatedness between Listeria grayi and Listeria murrayi was reevaluated by using DNA-DNA hybridization, multilocus enzyme electrophoresis, and rRNA restriction fragment length polymorphism techniques. The high levels of similarity observed between the strains of these two species confirmed the data published since 1973 and indicated that they should be considered members of a single species. On grounds of priority, the species should be named L. grayi.