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A substance used to kill or slow the growth of bacteria Antibiotics:

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rod shaped bacteria

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Spiral shaped bacteria

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round shaped bacteria

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1. make insulin 2. make antibiotics 3. clean up oil spills 4. give plants nitrogen 5. break down organic matter 6. make foods like: pickles yogurt cheese buttermilk

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Viruses are NOT alive; cannot live on their own! Need a living host cell Dont grow and develop Dont use energy Diseases caused by viruses Yellow Fever, Influenza, Common Cold and AIDS

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Helps your body develop immunity to a disease The next time your body sees the disease, it will be able to attack.

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~an agent that causes a disease Ways to come into contact with a pathogen: Air Person to Person Contaminated Objects Animals Food and water

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~to stop the spread of disease using a mosquito net when sleeping so that the bugs cant bite you

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~to try to cure or heal the disease when you already have it taking antibiotics

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1. Plenty of rest 2. Drink lots of fluids 3. Cannot use antibiotics. They dont work.

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~a living thing that is too small to be seen without a microscope

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Extremely small, single-celled organisms without a nucleus; prokaryotic cells Tuberculosis, tetanus, strep throat, scarlet fever

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~an army of cells that fight pathogens

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A disease which CANNOT be spread from one person to another Noninfectious: allergies, asthma, diabetes, arthritis

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~a disease which CAN be spread from one person to another common cold, flu, AIDS

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~a specific illness How your body defends you from disease: Skin Mucus Enzymes Acid Fever

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Bacteria can cause disease. They invade a host organism to obtain nutrients. They harm the host while doing so. Bacteria can also make chemicals to treat disease. They can be genetically engineered to make antibiotics.

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An organism that belongs to the kingdom Protista (amoeba, paramecium, and algae).