ISO 11290-2:2017 specifies a horizontal method for
–      the enumeration of L. monocytogenes, and
–      the enumeration of Listeria spp. (including L. monocytogenes).
ISO 11290-2:2017 is applicable to
–      products intended for human consumption and for the feeding of animals, and 
–      environmental samples in the area of food production and food handling.