Transcript 1 - Murphy Health & PE

Chapter 13
Communicable
Diseases
Lesson 1
What Are Communicable
Diseases?
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 disease
Any condition that interferes with the normal
or proper functioning of the body or mind
 communicable
disease
A disease that can be spread to a person from
another person, an animal, or an object
 germs
Organisms that are so small they can only be
seen through a microscope
 pathogens
Germs that cause disease
 infection
A condition that happens when pathogens enter
the body, multiply, and cause harm
 viruses
The smallest and simplest pathogens
 bacteria
Simple one-celled organisms
 fungi
Organisms that are more complex than bacteria
but cannot make their own food
 protozoa
One-celled organisms that are more complex than
bacteria
In this lesson, you will learn to
 identify types of germs that can cause disease.
 describe what an infection is.
 explain how germs are spread.
 access information on safe drinking water.
Organizing Information
As you read this lesson, make
a list of different ways that
pathogens are spread.
How Pathogens Are Spread
Germs and Disease
A disease such as the common cold is a
communicable disease.
disease Any condition that interferes with the normal or proper
functioning of the body or mind
communicable disease A disease that can be spread to a
person from another person, an
animal, or an object
Germs and Disease
Communicable diseases are spread by germs.
germs Organisms that are so small they can only be seen
through a microscope
Germs and Disease
Pathogens are harmful germs.
pathogens Germs that cause disease
Germs and Disease
When the body cannot fight of an infection, a
disease develops.
infection A condition that happens when pathogens enter
the body, multiply, and cause harm
Kinds of Pathogens
Viruses are not alive.
viruses The smallest and simplest pathogens
Viruses are usually made of genetic material and
protein.
Kinds of Pathogens
Bacteria exist in every environment on earth.
bacteria Simple one-celled organisms
Most kinds of bacteria are not only harmless, but
actually helpful.
Kinds of Pathogens
Examples of fungi include molds, yeast, and
mushrooms.
fungi Organisms that are more complex than bacteria but
cannot make their own food
Fungi thrive in warm, moist environments.
Kinds of Pathogens
Many protozoa are harmless, but some can cause
disease.
protozoa One-celled organisms that are more
complex than bacteria
Kinds of Pathogens
Direct contact
with others
Contact with
animals or
insects
Indirect contact
with others
How
Pathogens
Spread
Contact with
contaminated
food or water
Contact with
someone
else’s blood
Sexual contact
Mosquitoes can infect
humans with West Nile
Virus. Controlling mosquito
populations is one way to
help control the spread of
West Nile Virus.
Lesson 1 Review
What I Learned
Vocabulary Define communicable disease and
pathogen. Write a sentence using both terms.
Lesson 1 Review
What I Learned
Identify What is an infection?
Lesson 1 Review
What I Learned
Give Examples What are three kinds of pathogens?
Give an example of a disease caused by each kind.
Lesson 1 Review
What I Learned
Explain Why is it important to clean kitchen cutting
boards carefully?
Lesson 1 Review
Thinking Critically
Analyze How does keeping insect populations down
help keep people healthy?
Lesson 1 Review
Thinking Critically
Apply Aaron wants a drink of water. He finds a plastic
cup on the table but does not know if it has been used
or not. Should Aaron use the cup? Explain your answer.
End of
Chapter 13
Communicable
Diseases
Lesson 1
What Are Communicable
Diseases?
Click for:
>> Main Menu
>> Chapter 13 Assessment