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Harmful microbes can cause disease and illness. For example viruses may cause flu, colds, measles and chickenpox. And a sore throat or ear ache is more likely to be caught as a result of bacterial infections.
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Harmful microbes cause tooth decay. | |
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Harmful microbes make bread, cheese and other such foods go mouldy. | |
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Harmful microbes cause stomach upsets called food poisoning. We get food poisoning from eating food which is contaminated by bacteria or viruses. | |
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Now you know some friendly, and some unfriendly microbes.
But did you know that this knowledge is only about 150 years old?
