Download Development of infectious diseases

Lecture in Health 3
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Despite all your body’s defenses, pathogens
occasionally are able to enter your body and cause
disease.
When this happens, you suffer through the
discomfort that an infection usually causes.
A quick recovery, however, depends on getting
rest and eating a well-balanced diet.
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Fever
Inflammation or swelling
Pain
Chilling
Loss of appetite
Feeling of weakness
Over production of mucus or pus
Irritability
Prodromal
Stage
1-2 days
First
symptoms
appear
Acute Stage
2-5 days
Most severe
symptoms
occur
Recovery
Stage
2-4 days
Symptoms
diminishing
Disease is contagious
Convalescence
1-3 days
No
symptoms
but relapse
possible
Immunity
Exposure
Incubation
Stage
1-3 days
Pathogen
enters the
body and
multiplies
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Physical and Chemical defenses
Physical Defense
a. Skin
b. Mucous membranes
c. Sneezing
d. Cilia
e. Coughing
Chemical Defense
a. Saliva
b. Gastric juice
c. Mucous
d. Resident bacteria
e. Urine
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Inflammation
-the body’s response to all kinds of
injury, from cuts and scrapes to internal
damage caused by infectious diseases.
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The Immune System
-the body’s last and most sophisticated
line of defense against pathogens.
-it is made up of cells in our blood,
lymph bone marrow, and other tissues.
-certain cells in the immune system are
“tailor-made” for each pathogen.
Types of Immunity
Active immunity- immunity that our own
body system create. It results from
having a disease or receiving a vaccine.
Passive immunity- immunity that is acquired
by receiving antibodies from another
immune system.
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5.
What are the three lines of defense against
infection?
Distinguish active from passive immunity.
What are antibodies?
Enumerate the 3 types of T cells and explain
their function.
How does a vaccine cause immunity?