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... excreted in faeces. If the bacterium comes in contact with drinking water, then it can infect people. If you do not wash your hands after you have been to the toilet then you can also pass the bacteria onto food; this also can cause people to become infected. Fish and shellfish that have been living in infected water can spread cholera. Shellfish filter large amounts of water and concentrate the bacteria. The cholera out break in Peru in 1998 was thought to be related to contaminated algae; this is a very effective way for Cholera to spread to coastlines. Direct infection is a rare accuracy because a large amount of the bacteria is needed to cause infection; this large quantity is not normally present in an infected persons faeces or vomit. The bacteria needs a chance to multiply in water or food before it can cause risk to people with a normal ...