Tetanus infection occurs when the spores of the disease causing bacteria enter the body through an open wound, an animal or insect bite, a burn or snow bite contaminated by dust, soil or animal waste. It is not contagious and it cannot be transferred from one person to another. The bacteria may be in the form of spores in the soil for years and remain inactive but become infectious once it is activated.
Causes of Tetanus Include:
These can all be the causes of tetanus infection and for the introduction and growth of the deadly bacteria in the body. Once the bacteria start multiplying in the body, they produce a powerful nerve toxin which binds to the motor nerves of the body and alters the interaction between the muscles and the nerves, affecting the signal for muscles to tighten.
Risks of tetanus infection are higher for those who work in farmyards with animals as the chances of stepping on a nail or exposing a skin abrasion to possible sources of tetanus spores are higher. Burn victims, diabetics with ulcers or gangrene in the foot, and those with chronic skin problems like skin ulcers, abscesses and psoriasis, run the risk of contracting tetanus more and should ensure that they get their booster doses of the vaccine on time. Booster doses are required at least once in ten years for everyone to maintain immunity against the bacteria. They are also given before surgery, dental extractions and to expectant mothers. People who abuse drugs or have a heroin or cocaine addiction are more prone to tetanus infection than others as the likelihood of using unsterile syringes is high. Burn victims also run the risk of contracting tetanus with the contamination of their open wounds.