1. Understanding Communicable Diseases

2. Causes of Communicable Diseases

3. Germs and Diseases Germ and Diseases
Communicable Diseases – Disease that can be passed from one person to another
- communicable disease caused by microorgansims that can only be seen through an microscope
Non Communicable Diseases – Like asthma that cannot be passed from one person to another

4. Types of Germs
Viruses – The smallest and simplest life form. They cause a wide range of diseases.
Most diseases caused by virus or bacteria
Colds, chicken pox, AIDS, viral pneumonia, flu, measles, smallpox, mumps, herpes, rabies, polio, mononucleosis

5. Types of Germs
Bacteria – Tiny one celled oraganisms that live nearly everywhere
Most harmless, but some cause disease
Virus and bacteria most common cause of disease
Strep throat, tuberculosis, pinkeye, food poisoning, typhoid fever, gonorrhea, diptheria, lyme disease, bacterial pnuemonia

6. Types of Germs
Fungi – Primitive life forms that cannot make their own food
Athletes foot
Ring worm

7. Types of Germs Protozoa – One celled, animal-like organisms
Many are harmless
Cause diseases as malaria and amebic dystentery

8. How Germs are spread
Direct contact – you get germs on your hands and skin through direct contact with another person
Sometimes by sexual contact

9. How Germs are spread
Indirect contact – someone coughs or sneezes, expelling germs into the air
Other people breath these germs
Colds, flu, tuberculosis spread this way
Drinking glasses, eating utensils, other personal items

10. How Germs are spread Contact with animals or insects –
Rabid animals spreads rabies
Lyme disease is transmitted through tick bites

11. How Germs are spread Other Contacts – Contaminated food or water
This type of food poison is called Salmonella