Diarrhoea is usually a symptom of an infection in the intestinal tract, which can be caused by a variety of bacterial, viral and parasitic organisms.
2
感染：腹泻是由许多细菌、病毒和寄生虫引起的感染症状，其中多数是由粪便污染的水源传播的。
Infection: Diarrhoea is a symptom of infections caused by a host of bacterial, viral and parasitic organisms, most of which are spread by faeces-contaminated water.
3
感染细菌的许多人可能没有任何的症状。
Many people infected with the bacteria may not have any symptoms.
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