[Incidence of Listeria in food].

It is only recently that the role of food in the appearance of human listeriosis has been shown up. However, the increasing number of studies made, up to date, don't let us appreciate the influence of Listeria, and more particularly Listeria monocytogenes, in a somehow satisfying way. The problems set by the evaluation of this incidence are called up firstly, and afterwards the data concerning different food-stuffs (meat and meat products, milk and milk products, sea foods, vegetal products) are reviewed, trying to explain the origin for each of it. To conclude, some research axes, susceptible of being developed are called up.