UNIT 7 PACKET- INFECTIOUS DISEASES
NAME: ___________________________________
HOUR: ___________ DATE: _________
1
NO: ______
Chapter 21: INFECTIOUS DISEASES
INFECTIOUS DISEASES
Infectious Diseases are caused by _________________________ or _________________________ that enter and
_________________________ within the human body. An _____________________is an unusually high occurrence of a
disease in a certain place during a certain time period. It is a disease that affects many people at the same time.
FILL IN THE DEFINITIONS FOR THE TERMS BELOW USING YOUR TEXT PAGES 548 – 549
TERM
DEFINITION
EXAMPLE
PATHOGENS
BACTERIA
TOXINS
VIRUSES
FUNGI
PROTOZOANS
OTHER
PATHOGENS
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Chapter 21: INFECTIOUS DISEASES
HOW PATHOGENS ARE SPREAD
HOW DOES A PERSON
COME IN CONTACT WITH A
PATHOGEN
HOW WOULD A PATHOGEN SPREAD BY EACH ONE OF THE METHODS
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EXAMPLES OF INFECTIOUS
DISEASES SPREAD WITH THAT
METHOD
INFECTED PERSON
INFECTED ANIMAL
CONTAMINATED
OBJECTS
CONTAIMINATED FOOD,
SOIL OR WATER
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Chapter 21: INFECTIOUS DISEASES
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YOUR BODY HAS 3 LINES OF DEFENSE AGAINST PATHOGENS
YOUR BODY’S PHYSICAL AND CHEMICAL DEFENSES
1ST LINE OF
DEFENSE
BODY’S
DEFENSES
2ND LINE OF
DEFENSE
INFLAMMATION
INFLAMMATION
________________________ is your body’s general response to all kinds of
________________________, from cuts and scrapes to internal ________________________. After
injury chemicals are released and blood vessels enlarge. ________________________, other fluids and
________________________ blood cells, also known as ________________________, begin to leak out
of the enlarged vessel. The phagocytes engulf and ________________________ pathogens. During this
process the infected area becomes red, ________________________, and sore. This is inflammation.
3RD LINE OF
DEFENSE
IMMUNE SYSTEM
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Chapter 21: INFECTIOUS DISEASES
COMMON INFECTIOUS DISEASES
BACTERIAL DISEASES
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Infectious diseases caused by bacteria are known as bacterial diseases. These diseases can occur over and over
throughout your life. They are curable with the proper medical attention and most commonly treated with antibiotics.
Antibiotics are drugs that inhibit or kill bacteria. Different antibiotics are available for different bacterial diseases.
BACTERIAL DISEASE
SYMPTOMS
STREP TROAT
LYME DISEASE
BACTERIAL MENINGITIS
TUBERCULOSIS
VIRAL DISEASES
Infectious diseases caused by viruses that enter the body and multiply are known as viral diseases. These diseases can
not be treated with antibiotics but symptoms can be treated with over-the-counter medications.
VIRAL DISEASE
SYMPTOMS
COMMON COLD
INFLUENZA (FLU)
PNEUMONIA
HEPATITIS (A, B, AND C)
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