o find TB bacteria, the simplest method can be used Zielh-Nelssen staining technique to look at TB bacilli under the microscope. Tuberculosis bacilli acquire a characteristic red color with this staining method. This is a test with high specificity, but low sensitivity (about 30%). There are also other techniques such as Mantoux reaction, Quantiferon (diagnostic value is not high), TB culture (is the gold standard, but it takes a long time and not all laboratories can do it).