Efficacy of bacteriocin-containing cell-free culture supernatants from lactic acid bacteria to control Listeria monocytogenes in food

► Identification of antagonistic substances by mass spectrometry. ► The expression of bacteriocins can be optimized by culture conditions. ► Class IIa bacteriocins experience selective inactivation in food. ► Inhibition of Listeria by the tested fermentates is only transient.