破傷風菌
Tetanus is caused by the tetanus bacterium "Clostridium tetani". Tetanus is an international health problem, as "C. tetani" endospores are ubiquitous. Endospores can be introduced into the body through a puncture wound (penetrating trauma). Due to "C. tetani" being an anaerobic bacterium, it and its endospores thrive in environments that lack oxygen, such as a puncture wound. With the changes in oxygen levels, the drum stick-shaped endospore can result in quick spread.