Classic symptoms of chronic cough with sputum bloody, fever, night sweats and weight loss (the last of the formerly dominant colloquial term "consumption"). Infection of other organs causes a wide spectrum of symptoms. Diagnosis is based on radiology (general radiographs of the chest), tuberculin skin tests and microscopic examination of blood and microbiological culture of bodily fluids. Treatment is difficult and requires a prolonged course of multiple antibiotics. Social contacts also check and if necessary, treatment. Antibiotic resistance is a growing problem in (extensively) multi-drug resistant tuberculosis. Prevention relies on screening programs and vaccination, usually with bacillus Calmette-Guerin vaccine.
One-third of the world's population is believed to be infected with Mycobacterium tuberculosis, as well as new infections of about one second. The proportion of people who become ill with tuberculosis worldwide each year, but remained stable or declining due to population growth, the absolute number of new cases continues to grow. Given  In 2007, approximately 13.7 million chronic active cases, 9.3 million new cases and 1.8 million deaths, mostly in developing countries countries.In addition, more and more people in the developed world, tuberculosis, because their immune system, but due to the higher impact of immunosuppressive drugs, substance abuse and HIV affected. TB is not uniform throughout the world, about 80% of the population in many Asian and African countries testing positive in tuberculin tests, and only 5-10% of the U.S.