Bacteria in our world

Bacteria live in our irrigation, our food, and our bodies. Much what we know about bacteria was learned by scientists fight bacterial diseases. But of the thousands of types of bacteria only a minority cause diseases. Many bacteria do things that are important and even helpful to us.

Great for the Environment

Life as we -know it could not exist without bacteria. Bacteria are very important to the health of Earth. They help recycle dead animals and plants. Bacteria also play an important role in the nitrogen cycle.

Nitrogen Fixation

Most living things depend on plants. Plants need nitrogen! grow. Nitrogen gas makes up about 78% of the air, but most plants cannot use nitrogen directly from the air. They need to take in a different form of nitrogen. Nitrogen-fixing bacteria take in nitrogen from the air and change it to a form that plants can use. This process, called nitrogen fixation,.

Bacteria in Your Food

Believe it or not, people raise bacteria for food! Every time you eat cheese, yogurt, buttermilk, or sour cream, you are also eating bacteria. Lactic acid-producing bacteria break down the sugar in milk, which is called lactose. In the process, the bacteria change lactose into lactic acid. Lactic acid preserves and adds flavor to the food.

Good for Human
Bacteria do much more than help keep our environment clean. Bacteria also help produce many of the foods we eat every day. they even help make important medicines.

Cleaning Up Environment

Bacteria and other microorganisms are also used to fight pollution. Bioremediation means using microorganisms to change harmful chemicals into harmless ones. Bioremediation is used to clean up hazardous waste from industries, farms, and cities. It is -also used to clean up [oil spills. The Scientists also are use bacteria to remove pollutants from the soil.

Recycling leaves: have you ever seen dead leaves and twigs on a forest floor? These leaves and twigs are recycled over time with the help of bacteria. Decomposer bacteria break down dead plant and animal matter, peaking down dead matter makes nutrients available to other living things.

Harmful Bacteria

Humans couldn't live without bacteria, but bacteria can also cause harm. Scientists learned in the 1800s that some bacterial are pathogenic . Pathogenic bacteria are bacteria that cause disease. Pathogenic bacteria get inside a host organism and take nutrients from the host's cells. In the process,: harm the host. Today, we are protected from many bacterial diseases by vaccination. Many bacterial diseases can also be treated with antibiotics.

Genetic Sampling

Scientists change the genes of bacteria, or any other living thing, the process is called genetic engineering. Scientist have been genetically engineering bacteria since 1975. In that year, researchers put genes from a frog like the one in into the bacterium Escherichia coli.|The bacterium then started making copies of the frog genes, Scientists can now engineer bacteria to make many products,; such as insecticides, cleansers, and adhesives.

Making Medicines

What's the best way to fight disease-causing bacteria? Would you believe that the answer is to use other bacteria? Antibiotics are medicines used to kill bacteria and other micro organisms. Many antibiotics are made by bacteria.


The human body needs insulin to break down and use sugar! and carbohydrates. People who have diabetes do not make enough insulin. In the 1970s, scientists discovered how to put) genes into bacteria so that the bacteria would make human insulin. The insulin can then be separated from the bacteria and given to people who have diabetes.

Big image