Among patients with tuberculosis who were born abroad, the average time from their most recent stay abroad to the onset of tuberculosis is less than 4 years, whereas the time from their first arrival in France is 10 years. Among patients born in France, 30% had lived abroad. Seventy percent of patients reported having had no contact with a person with tuberculosis. These findings complement certain epidemiological insights provided by mandatory tuberculosis reporting regarding migrant populations and people born in France. (R.A.)