The ability to enter into an avirulent viable but non-culturable (VBNC) form is widespread among Listeria monocytogenes isolates from salmon, patients and environment Toril Lindbäck, Martin E. Rottenberg, Sylvie M. Roche and Liv Marit RørvikVet. Res., 41 1 (2010) 08DOI: https://doi.org/10.1051/vetres/2009056