Life Science Chapter 6

Body Defenses and Disease

Flu

Life Science 6.1

Disease

Ebola Virus

1. Explain the difference between infectious diseases and noninfectious disease.

2. Identify five ways that you might come into contact with a pathogen.

3. Discuss four methods that have helped reduce the spread of disease.

Objectives:

Legionnaires’ Disease

Noninfectious diseases Some diseases, such as most cancers and heart

disease, which are not spread from one person to another.

Infectious disease Disease that can be passed from one living thing

to another is an. Caused by agents called pathogens.

Causes of Disease

Colon CancerCells

Air Some pathogens travel through the air, such as

when someone sneezes.Contaminated Objects

Drinking glasses, doorknobs, keyboards, combs, and towels that have been used by an infected person can all pass pathogens.

Pathways to Pathogens

Swine flu

Person to Person You can become infected with some illnesses by kissing,

shaking hands, or touching the sores of an infected person.

Animals Ringworm and Lyme Disease are carried by animals.

Food and WaterBacteria growing in foods and beverages can cause

illness.Example : Salmonella

Ring worm

Salmonella

Pasteurization The method of using heat to kill bacteria.

Vaccines and ImmunityThe ability to resist or recover from an infectious

disease is called immunity.A vaccine is a substance that helps your body

develop immunity to a disease.Antibiotics

Substance that can kill bacteria or slow the growth of bacteria.

Putting Pathogens in Their Place