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Bell Ringer
Common Infectious Diseases
Section 3
November 11, 2007
Statistically….
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The number of school days missed each year
in the United States due to the flu:
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The amount that is spent on medical costs
and lost work each year in the United States
because of food borne illnesses:
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38 million
$5 - $6 Billion
The amount the United States spends each
year to treat infectious disease:
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$120 Billion
Objectives
1.
2.
3.
4.
5.
State why diseases affect everybody
Identify 2 bacterial diseases
Identify 2 viral diseases
List examples of fungal, protozoan,
and parasitic infections
Name 2 organizations in your
community that help prevent and treat
the spread of infectious disease
Diseases Affect Everybody ! !
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There are so many pathogens in so
many places that it is impossible to
avoid all of them.
Most susceptible
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Young
Elderly
What is our best defense…?
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To avoid behaviors that increase our
chances of becoming infected.
Remember…Prevention…
before….Treatment
Common Bacterial Diseases

Where are bacteria found??
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Everywhere
Dark, warm, moist places = our bodies
Grow and multiply quickly
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Very common
Take over our bodies
Common Bacterial Diseases
pg. 330
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Strep Throat
Sinus Infection
Food Poisoning – Salmonellosis
Meningitis
Tetanus
Common Viral Diseases
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You have probably acquired a few viral
infections before.
You probably have fought off some viral
infections.
Some are more serious than others…
Viral Infections – pg 332
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Flu
Cold
Mumps
Measles
Mononucleosis
Hepatitis
SARS
Others…
Mumps
Pandemic vs. Epidemic
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Epidemic: a classification of a disease that
appears as new cases in a given human
population, during a given period, at a rate that
substantially exceeds what is "expected."
Pandemic: an epidemic that spreads through
human populations across a large region (for
example a continent), or even worldwide.
Other Common Infections
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Fungal Infections
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Athlete’s Foot
Jock Itch
Ringworm
Mostly live in warm, moist area
Symptoms: itchy, red, lesions
Prevention: Good Hygiene, Clothing
Treatment: Over the counter, Doctor
Fungal Infections
Fungal Infections
Protozoan Infections

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Protozoa are most often found in water
and soil.
About 20,000 kinds of Protozoa exist,
but only a small number of them cause
disease.
Protozoan Infections

Malaria: most widespread and serious
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Symptoms: fever, chills, headache, fatigue
Transmission: mosquitoes
Several millions people infected each year
Apporx. One million die each year
Amebic Dysentery: an inflammation of the
intestine caused by an ameba.
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Symptoms: nausea, diarrhea, fever
Parasitic Infections
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Diseases caused by animal parasites
Examples of parasites that live in body:
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Hookworms
Flukes
Pinworms
Tapeworms
Parasitic Infections
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Examples of parasites on the body:
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Lice
Leeches
Ticks
Fleas
Parasitic Infections
Parasitic Infections
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Transmission
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Infected Food
Infected Drinking Water
Infected Soil
Bitten by Insects
Treatment:
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Over the counter and prescription
Medication
Traveling around the World
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Easier for diseases to spread
Work together world wide
CDC and NIH are working and watching
out for disease daily.
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Prevent
Treat
Eliminate