被遗忘的疾病—血吸虫病(3)
Some diseases can kill a person.
But there are other diseases that make life painful. Schistosomiasis is this kind of disease.
Schistosomiasis causes many different problems in a person's body.
But to understand what happens to a person's body, we must first know how a person gets schistosomiasis.
Schistosomiasis is caused by a very small organism.
This organism lives in dirty water.
If a person's skin touches this dirty water, that person is at risk.
The organisms may enter his body.
The organisms sense movement from a person.
They like the chemicals from a person's body.
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