There are many strains of cholera in nature but when most people are infected they show no apparent difference, just two kinds of symptoms-- vomiting and diarrhoea. This leads to a lack of electrolytes and water in the intestines which in serious cases can be fatal.
大自然中的霍亂弧菌有數十種，其中絕大部分，人類感染後不會產生任何異狀；只有兩種含有毒素，會導致上吐下瀉，以致腸內水份、電解質大量流失，重者致命。