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

rod shaped bacteria

Spiral shaped bacteria

round shaped bacteria

 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

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

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

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

~to stop the spread of disease using a mosquito net when sleeping so that the bugs can’t bite you

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

1. Plenty of rest 2. Drink lots of fluids 3. Cannot use antibiotics. They don’t work.

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

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

~an army of cells that fight pathogens

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

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

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

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