microorganisms are they helpful or harmful?

     Microorganisms, tiny microscopic germs that we cannot see, but know that they are around everywhere.  They can be outside in our environment or even in our own body.  However, are these bacterium helpful to us or are they there waiting for a chance to harm us?  Many bacteria, for example, some bacteria and yeast are used to help ferment certain types of food.  The five processes in the nitrogen cycle, which include fixation, uptake, mineralization, nitrification, and denitrification are all driven by microorganisms.  In fact, many other bacteria are used to help make medicine that help cure us from many different infections.  On the other hand, there are some bacteria that are not so helpful.  These bacteria are known as pathogens and they can be so harmful that we can die from them.  In conclusion, microorganisms can be either beneficial or harmful and we should take precautions on how to prevent any disease.