[Screening and prevention of tuberculosis, an experiment in Marseille].

In order to apply the recommendations of the French High Council on Public Health (CSHPF), the association "Médecins du Monde" and the departmental centre for the fight against tuberculosis led; in 2010-2011, two campaigns for on-site screening, in Marseille, with Roma families in situations of precariousness. These campaigns came up against a number of difficulties which must be addressed in order to make them more effective.