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Communicable Disease


Communicable Disease 8 Health Vocabulary Disease- an illness that affects the proper functioning of the body or mind Communicable Diseases- diseases that can be ... – PowerPoint PPT presentation

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Title: Communicable Disease

Communicable Disease
  • 8 Health

  • Disease- an illness that affects the proper
    functioning of the body or mind
  • Communicable Diseases- diseases that can be
    passed from one person to another

Types of Pathogen/Germs
  • Bacteria tiny one-celled organisms that grow
    virtually everywhere, can be harmless or harmful,
    there are 3 types cocci, bacilli, and spirilla

Types of Pathogen/Germs
  • Viruses- smallest and simplest forms of life, are
    very specialized, can only grow and reproduce in
    living things
  • Rickettsias- small bacteria that are spread by
    the bites of insects, such as ticks and lice

Types of Pathogen/Germs
  • Fungi- are simple life forms that are unable to
    make their own food, grow best in warm, dark,
    moist areas (ring worm, athletes foot)
  • Protozoa- simple animal like organisms, have the
    ability to move through fluids in search of food

Preventing the Spread of Diseases
  • How are Germs Spread?
  • Close Contact with a person who has the germ.
  • Direct contact with a person who has the germ
  • Contact with animals
  • Sharing utensils
  • Contaminated drink or foods that contain germs

Preventing the Spread of Diseases
  • How can you prevent the Spread of Disease?
  • Practice Good Health Habits
  • Practice Good Health Behaviors to Protect
    Yourself Practice Good Health Habits to
    Protect Others

The Bodys First Line of Defense
  • Tears- wash germs away from eyes, contain
    chemicals that can kill some germs
  • Skin- if the skin is unbroken it acts as a
    barrier that germs cannot penetrate

The Bodys First Line of Defense
  • Mucous Membranes- secrete mucous that traps germs
  • Saliva- washes germs from your teeth and helps
    keep the mouth clean, contains chemicals that
    kill germs

The Bodys First Line of Defense
  • Gastric Juice- destroys germs that enter the
    stomach through food and drink

The Bodys Second Line of Defense
  • Inflammatory Response
  • It helps by flooding the spaces with lymph fluid
    which contains white blood cells, phagocytes, and
    others. It also helps to contain the contaminate.
  • Phagocytes released by nearby blood vessels, they
    engulf germs and destroy them
  • Fever kills germs that cannot survive body temp
    higher than usual

Third Line of Defense
  • gives the body the ability to remember how to
    destroy the same germ if it invades again. The
    next time the body can respond quickly to kill
    the germ so you dont get sick.

Third Line of Defense
  • The Lymphatic System
  • A secondary circulatory system of vessels and
    nodes that carry a fluid called lymph
  • Lymph nodes are small lumps of lymphatic tissue
    located throughout the system that act as filters
    to keep germs from invading body tissues

Third Line of Defense
  • The white blood cells in the
  • lymphatic system are lymphocytes
  • B-cells- produce antibodies that fight germs
  • T-cells- attack germs directly and stimulate
    B-cells to work
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Immunity and Vaccines
  • You can become immune to a viral disease by
    having that disease once before.
  • (flu that specific strand, chicken pox)
  • Vaccine- a preparation of dead or weakened germs
    that is injected into the body to cause the
    immune system to produce antibodies

Common Communicable Diseases
  • The Common Cold
  • most common communicable disease, caused by
  • Influenza
  • characterized by exhaustion, chills, headache,
    body ache, respiratory problems, and fever.
  • Strep
  • Sore throat caused by streptococcal bacteria

Common Communicable Diseases
  • Hepatitis
  • viral disease of the liver characterized by
    yellowing of the skin and the whites of the eyes.
    Hepatitis A B and C
  • Mononucleosis
  • A viral disease that attacks the lymph nodes in
    the neck and throat, most common in teens and
    young adults.