In order to evaluate the efficacy and safety of the 4-month test gatifloxacin-containing regimen, comparison will be made with a standard 6-month regimen, recommended by WHO. Patients will be treated with one of the two regimens that will be randomly allocated. A total of 2070 patients will ne recruited in the trial and followed-up for a duration of 2 years. The trial is multicentre, and conducted in 5 countries in Africa.