While it may seem meaningless, some common cause of lockjaw are dust, dirt, animal droppings, open wounds, cuts, and rusty nails. A bacteria is transmitted called Clostridium tetani. Once inside the human body, it quickly spreads to the central nervous system and produces a toxic substance called tetanospasmin. This substance begins to block nerve signals to the spinal cord and the muscles throughout the body. This bacteria is resistant to high heat.
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