Drug-resistant tuberculosis is contagious because drug-resistant tuberculosis is originally diagnosed by bacteria, and Mycobacterium tuberculosis can be found in high numbers in patients. Tuberculosis is a chronic infectious disease that is transmitted mainly through the respiratory tract. Spitting anywhere is the culprit of infectious respiratory diseases, and it is a vice that people should develop good hygiene habits and not spit anywhere. Not spitting anywhere is not the same as swallowing sputum into the abdomen, because the large amount of tuberculosis bacteria contained in sputum may lead to intestinal tuberculosis. When there is sputum, it must be spit into the spittoon or wrapped in toilet paper and burned, which is the best way to handle it. If spit is spit into the spittoon, 84 disinfectant still needs to be put in the spittoon. If a patient with drug-resistant tuberculosis is at home, wrapping the sputum in paper and burning it is the best method of disposal. Patients should not spit into the bathroom because Mycobacterium tuberculosis can usually survive for 6-8 months in a dark, humid environment. Patients may also spit into a special handkerchief, which should be washed and disinfected before use to reduce sputum contamination. If a cow has tuberculosis, the milk produced by the sick cow will carry mycobacterium tuberculosis. If a person drinks milk containing mycobacterium tuberculosis, he or she will be infected with tuberculosis, so it is clinically recommended to boil the milk when drinking it.