Avirulence of Viable But Non-Culturable Listeria monocytogenes cells demonstrated by in vitro and in vivo models Jean Michel Cappelier, Valérie Besnard, Sylvie Roche, Nathalie Garrec, Etienne Zundel, Philippe Velge and Michel Federighi Vet. Res., 36 4 (2005) 589-599 DOI: 10.1051/vetres:2005018