Tetanus bacteria generally survive for about 10 minutes in exposed air, but there is some variability in the exact survival time. Tetanus belongs to the group of anaerobic bacteria, bacteria that cannot grow in a concentration of 18% oxygen, or 10% carbon dioxide. Tetanus bacteria are usually found in the intestinal tracts of humans and animals, and tetanus infections are more likely to occur when wounds come into contact with rust, but also because they are anaerobic, and when exposed to the air, the survival time is about ten minutes. However, the above situation also needs to be combined with the physical environment and other factors, and can not be generalized. When the body is infected with tetanus bacteria, the patient will have symptoms such as increased muscle tone, weakness, dizziness, weakness in chewing and a bitter smile. In daily life, personal protection should be taken to avoid contact with rusty objects. Suspected tetanus bacteria infection should go to a nearby hospital for treatment.