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Infectious disease STD
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Infectious Diseases

Infectious Diseases

Slide 2

Infectious Diseases - A disease caused by an agent that can pass from one living thing to another

Infectious Diseases - A disease caused by an agent that can pass from one living thing to another

Communicable disease an infectious disease that is passed from one person to another.

Slide 3

What causes Inf.Dis.

What causes Inf.Dis.

Bacteria - a type of microorganism that can cause disease.

Strep throat, food poisoning, urinary tract infections.

Viruses a type of agent that can cause disease.

Cold, flu, cold sores, measles, mono.

Slide 4

How are they spread

How are they spread

Air

Contact with contaminated objects

Person to person

Animals that spread disease

Food and water

Slide 5

Defenses against infection

Defenses against infection

Skin

Chemical warfare on germs (sweat and oils produce acids that kill bacterial)

Mucus membranes

Stomach acids

Helpful microorganisms

Inflammations

The immune system

Slide 6

Weapons

Weapons

T-cells cells that regulate the action of the immune system

Antibodies substances that stick to the surface of pathogens slowing their action.

B-cells cells in the immune system that produce antibodies against infection

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Immunization  injection of a small amount of a pathogen that will provide protection against an infectious disease.

Immunization injection of a small amount of a pathogen that will provide protection against an infectious disease.

Antibiotics drugs that kill or limit the growth of bacteria.

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HIV

HIV

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H  Human: virus can only infect humans

H Human: virus can only infect humans

I Immuno-deficiency: the effect of the virus is to create a deficiency, a failure to work properly with the bodys immune system.

V Virus: one of its characteristics is that it is incapable reproducing by itself. It reproduces by taking over the machinery of the human cell

Slide 10

How is HIV spread

How is HIV spread

Bodily Fluids

Blood

Semen

Vaginal secretions

Breast milk

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Sexual Contact

Sexual Contact

Sexual intercourse

Oral sex

Anal sex

Slide 12

Blood to Blood Contact

Blood to Blood Contact

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