Division Laboratory Criteria

At least one of the following two:

• Isolation of Listeria monocytogenes or detection of nucleic acid of Listeria monocytogenes from a normally sterile site

• In a pregnancy-associated case also: Isolation of Listeria monocytogenes or detection of nucleic acid from Listeria monocytogenes in a normally non-sterile site (for example, placental tissue, amniotic fluid, meconium, vaginal swab) or from a foetus, stillborn, newborn or the mother