PRELIM LEC: INTRODUCTION TO IMMNUNOLOGY AND SEROLOGY AND ITS HISTORICAL BACKGROUND Flashcards
Study of a host’s reactions when foreign substances are introduced into the body
IMMUNOLOGY
How the body fights infection, irritants (allergen, UV), carcinogens and toxins.
IMMUNOLOGY
Host’s reaction when foreign substances (antigens) are introduced to the body.
IMMUNOLOGY
Best defined as the study of components of the immune system and how the body defends itself against dse.
IMMUNOLOGY
How the body components respond and interact to provide immunity.
IMMUNOLOGY
IMMUNOLOGY
HOW?
Recognition, Interaction, Disposal, Regulation
IMMUNOLOGY
WHO?
Cells, Molecules, Tissues
It is also the study of the medically related consequences that arise when these mechanisms
IMMUNOLOGY
IMMUNOLOGY It is also the study of the medically related consequences that arise when these mechanisms either:
- fail
- respond in an exaggerated way
fail can lead to:
- autoimmune disorder
- immunodeficiencies
respond in an exaggerated way can lead to:
hypersentivity disorders
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Consequences of immune interactions:
a. Elimination of pathogen (desirable)
b. Overexertion (Undesirable); may lead to autoimmune dse
own immune system attacking own body (ex. arthritis, Graves, Cushing, Lupus); failure to identify own cells
Autoimmune disorder
immune system does not perform well, low immune system.
Immunodeficiency
Study the px background before concluding status of immunity. Developed from prior exposure.
IMMUNITY
Condition of being resistant to infection
IMMUNITY
It is from which the study of immunology is rooted from.
IMMUNITY
Principle: Antigen gains entrance to an appropriate lymphoid area of the body.
IMMUNITY
Immune system can be advantageously manipulated to protect or treate dse
IMMUNITY
EXAMPLE OF Immune system can be advantageously manipulated to protect or treate dse
Vaccination & Anti-inflammatory drugs
Composed of wide array of cells, soluble molecule (humoral factors), and tissues
IMMUNE SYSTEM
Composed of wide array of cells, soluble molecule (humoral factors), and tissues with the following characteristics:
- Specificity
- Memory
- Mobility
- Replicability
- Cooperation between different cells or cellular products
Primary role – recognize self from non-self, and defend against non-self
IMMUNE SYSTEM
IMMUNE SYSTEM PRIMARY ROLE 2 TYPES:
➔ Natural and Acquired Resistance
➔ Recovery
IMMUNE SYSTEM Divided into two categories:
- Innate/Natural Immune System
- Adaptive/Acquired/Specific Immune System
do not possess immunologic memory
Innate/Natural Immune System
possess immunologic memory
Adaptive/Acquired/Specific Immune System
TYPES OF IMMUNITY:
- INNATE IMMUNITY
- ADAPTIVE IMMUNITY
Present at birth “natural”
INNATE IMMUNITY
No prior exposure to pathogen required
INNATE IMMUNITY
Little or no memory of prior exposure
INNATE IMMUNITY
Non-specific
INNATE IMMUNITY
Immediate response
INNATE IMMUNITY
Same response upon reexposure
INNATE IMMUNITY
Acquired; develops overtime
ADAPTIVE IMMUNITY
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Exposure to pathogen required
ADAPTIVE IMMUNITY
Has memory of prior exposure
ADAPTIVE IMMUNITY
Specific
ADAPTIVE IMMUNITY
Slow response
ADAPTIVE IMMUNITY
Faster and increased response upon reexposure
ADAPTIVE IMMUNITY
Both systems are essential to maintain good health; in fact, they operate in concert and are dependent upon one another for maximal effectiveness.
- INNATE IMMUNITY
- ADAPTIVE IMMUNITY
A foreign substance that may or may not induces an immune response
ANTIGEN
ANTIGEN 2 TYPES:
- Non-self
- Self-antigen
may or may not elicit immune response (e.g., carbs, proteins, amino acids, blood donated, food we ate)
Non-self
- from our body; Immunogens – always cause disease (ex. D. latum); Pathogen – immunogen that in living form (ex. fungi, bacteria, viruses)
Self-antigen
always cause disease (ex. D. latum)
Immunogens
immunogen that in living form (ex. fungi, bacteria, viruses)
Pathogen
2 TYPES OF TOLERANCE:
- Immunological tolerance
- Self-tolerance
the failure to mount an immune response to an antigen → bad thing; can’t recognize immunogen
Immunological tolerance
failure to attack the body’s own proteins
and other antigens a → good thing [immune system tolerates self-antigen; if body will not able to tolerate antigen an autoimmune response will happen]
➔ Eliminate non-self-components such as
infectious agents
Self-tolerance
During a plague in Athens, described a phenomenon where individuals who recovered from a certain disease rarely contracted the same disease again.
THUCYDIDES (430 B.C.)
Started the concept of immunity
THUCYDIDES (430 B.C.)
He recognized their “immune status”
THUCYDIDES (430 B.C.)
The term “smallpox” was first used in Europe in the 15th century to distinguish it from “great pox” (syphilis).
SMALLPOX
One of the deadliest known dse known to human and the only dse eradicated worldwide (most significant milestone in medicine)
SMALLPOX
Only infects humans.
SMALLPOX
Symptoms: High fever, vomiting, mouth sores, and characteristic of pustular (fluid-filled) lesions, which can lead to death.
SMALLPOX
1st discovered in 1350 BCE from Egyptian mummies.
SMALLPOX
Infected Mozart and Abraham Lincoln
SMALLPOX
Infected individuals are called “Speckled monster”
SMALLPOX
“Corkscrew-shaped” under Phase Contrast Microscope
SMALLPOX