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Bacteria: Friend or Foe?By Craigshon Harrington

Look for the key words in bold

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Bacteria are small, single- celled organisms that are classified into the Moneran Kingdom.

Most people think bacteria are the worst things on earth, but little do we know, bacteria

can also be helpful to you. How? Well…..

Introduction to Bacteria

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There isn’t just one type of bacteria, there is the spirilla, the bacillus, and the coccus. There’re also autotrophs, heterotrophs,

and decomposers.

The Different Types of Bacteria

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The bacillus (bacilli) is elongated, rod- shaped bacteria.

Bacillus

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Spiral (spirilla) are rigid, spiral shaped bacteria. They are distinguished by their

length, the number and size of the spirals it has, and the direction of the coil.

Spiral

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Coccus (cocci) are round or spherical shaped bacteria. It moves by drifting. It also causes

the scarlet fever.

Coccus

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Autotrophs make their own food.Heterotrophs eat other organisms, like us.

Decomposers help break down dead material.

Other Types of Bacteria

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How is bacteria

harmful?

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Once bacteria gets on your food, it could cause it to spoil

Bacteria in your mouth could cause tooth decay

Blue- Green Bacteria can wipe- out an entire pond ecosystem

Bacteria can cause strep throat, Lyme Disease, and other harmful diseases

Harmful Effects of Bacteria

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How is bacteria helpful?

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One type of bacteria, found in your intestines, helps you to digest your food

Even though bacteria causes diseases, it is also used to make medicines to cure those

diseases Bacteria is used to make dairy products like

yogurt and cheese They also help clean up waste

Helpful Effects of Bacteria

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They grow by eating Bacillus is found in E. coli, a well- known

disease They eat just about any organic matter

They live on water, in the air, and even in your mouth

They cause lots of diseases

Fun Facts about Bacteria

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Bacteria is both helpful and harmful There isn’t just one type of bacteria Some bacteria make their own food They live in lots of different places

We are heterotrophs They cause diseases and make medicine to

cure the diseases

So Remember….