Chapter 40 The Immune System and Diseases

any change, other than an injury, that disrupts the normal functions of the body

• Disease

• Pathogens

• Germ theory of disease

• Koch’s postulates

Tags

NGSS.HS-LS3-2

disease-causing agents

• Pathogens

• Disease

• Antigens

• Fever

the observations of Pasteur and Koch led them to conclude that infectious diseases were caused by microorganisms of different types, commonly called germs

• Germ theory of disease

• Pathogens

• Vectors

• Antibiotics

1. The pathogen should always be found in the body of a sick organism and should not be found in a healthy one. 2. The pathogen must be isolated and grown in the laboratory in pure culture. 3. When the cultured pathogens are placed in a new host, they should cause the same disease that infected the original host. 4. The infected pathogen should be isolated from the second host. It should be identical to the original pathogen

• Koch’s postulates

• Germ theory of disease

• Vectors

• Antibiotics

animals that carry pathogens from person to person

• Vectors

• Antibiotics

• Immunity

• Inflammatory response

are compounds that kill bacteria without harming the cells of the human or animal hosts

• Antibiotics

• Vectors

• Immunity

• Fever

the function of the immune system is to fight infection through the production of cells that inactivate foreign substances or cells.

• Immunity

• Inflammatory response

• Fever

• Interferons

a second line of defense is activated; a nonspecific defense reaction to tissue damage caused by injury or infection

• Inflammatory response

• Fever

• Immunity

• Antigen

elevated body temperature

• Fever

• Interferons

• Immune response

• Antigen

Tags

NGSS.HS-LS1-3

proteins that interfere with the growth of the virus

• Interferons

• Fever

• Immunity

• Vectors