How Do Bacteria Work To Harm Us and To Help Us?

Bacteria are tiny, one-celled organisms that can be found almost everywhere, in the deepest oceans, in the thickest soil, and up to 90,000 feet in the atmosphere. There are many kinds of bacteria, some which cause deadly diseases and some which are helpful to man.

Those which are harmful cause diseases in man, animals, and plants. They can cause food to spoil, even poisoning people who eat them.

But there are a great many bacteria that man and nature use in helpful ways. For example, bacteria play an important role in making buttermilk, sauerkraut, cheese, and vinegar by causing a chemical change called fermentation. Bacteria also attack dead plants and animals, and break them down into nourishment for the soil.

Bacteria are even used to purify water in sewer treatment plants!

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5 Comments

  1. your
    Posted 2009/03/19 at 7:20 pm | Permalink

    Thanks for answering many of my questions i am a student at a college i cannot address where and i thank for a good paragraph on bacteria cuz it is nasty.

  2. Anonymous
    Posted 2009/11/25 at 4:30 pm | Permalink

    i am coming for u

  3. Anonymous
    Posted 2009/11/25 at 4:33 pm | Permalink

    Who?

  4. Anonymous
    Posted 2009/11/25 at 4:33 pm | Permalink

    I am coming for Lachlan Smith

  5. Anonymous
    Posted 2009/11/25 at 4:37 pm | Permalink

    jokin
    my name is johnny and i live in candyland

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