1. Germs and Disease
Disease-any condition that interferes with the proper functioning of the body or mind.
Communicable disease-disease that can be spread to a person from another person, animal, or object.
Germs-organisms that are so small that they can be seen only through a microscope.
Pathogens-germs responsible for causing diseases.
Infections-condition that occurs when pathogens enter the body, multiply, and damage body cells.

2. Types of Pathogens
Viruses-the smallest and simplest disease-causing organisms, causing a wide range of health problems.
AIDS Influenza Rabies
Chicken Pox Measles Smallpox
Colds Mononucleosis Viral
Hepatitis Mumps Pneumonia
Herpes Polio

3. Types of Pathogens
Bacteria-tiny one-celled organisms that live nearly everywhere. Some are harmless and some are helpful, but can cause disease.
Bacterial pneumonia
Diphtheria
Food borne illness
Gonorrhea
Lyme disease
Pinkeye
Strep throat
Tuberculosis

4. Types of Pathogens
Fungi-primitive life-forms, such as molds or yeasts, that can’t make their own food.
Athlete’s foot
Ringworm

5. Types of Pathogens
Protozoa-one-celled organisms that have a more complex structure than bacteria.
Amebic dysentery
Malaria

6. How Pathogens Are Spread
Direct contact with others.
Skin to skin contact.
Colds are spread if you touch someone’s hand that has sneezed or coughed into their hand, then you touch your eyes or nose.
Indirect contact
Breathing in germs from a sneeze.
Sharing drinking glasses, food, eating utensils.
Touching a surface that is contaminated, doorknob, phone, ect.

7. How Pathogens Are Spread
Contact with animals or insects.
Being bit by a rabid animal.
Being bit by a deer tick may transmit Lyme disease.
Contaminated food and water.
Undercooked meat may result in E. coli bacteria, which could result in death.

8. How Pathogens Are Spread
Contact with someone else’s blood.
Through body contact or sharing of needles.
HIV
Hepatitis
Sexual contact.
Certain diseases are transmitted through sexual contact.
We will discuss this more in Lesson 4