破伤风杆菌广泛地存在于土壤及尘埃中。家畜如牛、马、羊等的粪便中含该菌较多,某些人群的粪便内也可含有该菌。人体皮肤粘膜受伤,特别是伤口深,很容易受到破伤风杆菌的感染。这是由于该菌是一种厌氧菌,而深部伤口供氧差,它会很快繁殖起来。破伤风可见于各种外伤,如弹伤、动物咬伤、烧伤、挫伤、针刺伤及树枝刺伤。新生儿可因脐带感染而得病,妇女可因不洁人工流产或分娩而感染。用泥 Clostridium tetani is found extensively in soil and dust. Livestock such as cattle, horses, sheep and other feces contain more bacteria, some people may also contain the feces within the bacteria. Human skin mucosa injury, especially deep wounds, it is susceptible to tetanus infection. This is because the bacteria is an anaerobic bacteria, and the deep wound poor oxygen supply, it will soon multiply. Tetanus can be seen in a variety of traumatic injuries, such as bullet wounds, animal bites, burns, bruises, needle sticks and twigs. Neonates can get sick by umbilical cord infections and women can get infected by unclean abortions or childbirth. Use mud