[Multidrug resistance tuberculosis - current problems].

The rising occurrence of multidrug-resistant tuberculosis (MDR-TB), defined as resistance to at least isoniazid and rifampicin, is a serious worldwide problem. The treatment of MDR-TB with alternative chemotherapy is difficult due to side-effects and treatment duration. It is also very expensive and sometimes unsuccessful. DOTS and DOTS-Plus strategy are necessary to achieve a good tuberculosis control.