Flashcards in pathpharm wk 5-infection and immune Deck (46)
What two factors are needed for an infection to occur?
A host and an organism
an invasion of a host caused by a pathogen
What are 4 different kinds of infections that can occur?
Bacterial, viral, fungal, parasitic
What is one of the most common and deadly bacterial infections today?
MRSA-caused by staph aureus
Bacteremia/speticemia is used to describe:
a systemic bacterial infection, in which bacteria is found in the blood
What is a common cause of bacteremia?
What are 3 examples of infections caused by viruses?
H1N1, HIV, the flu
Why are viral infections difficult to treat?
They do not follow a normal organism growth pattern, they are abnormally shaped, and have no nucleus just reverse transcriptase
Viruses are protected by several layers of ____________.
What are three examples of fungal infections?
candida (yeast), PCP, aspergillus
What are two examples of parasitic infections?
List the steps in the chain of transmission?
Infectious agent, susceptible host, portal of entry, mode of transmission, portal of exit, reservoir
T or F: The chain of transmission cannot be broken.
List three ways we can break the chain of transmission:
handwashing, education, @ portal of entry: proper wound care
Under normal circumstances inflammation can result in:
increasing healing, decreasing infection
T or F: Inflammation can result from infection.
T or F: Infection can result from inflammation.
FALSE- inflammation will not cause infection, inflammation is always in response to an infection
an altered immunologic response to an antigen resulting in disease or damage to the host
How does hypersensitivity develop?
a pathologic immune response develops after one or multiple exposures to an antigen
What is an allergy?
an exaggerated response to the environment
What is autoimmunity?
intolerance to self-antigens, does not recognize self as self
occurs when the immune system of on individual produces an immunologic response against tissues of another individual during transfusions, transplanted tissue, or a fetus during pregnancy
List the 4 mechanisms of hypersensitivity:
Type 1: IgE (allergies), Type 2: Tissue-specific, Type 3: Immune-complex, Type 4: Cell-mediated
What is happeneing during a Type I response?
What is an example of an allergic (IgE) response?
What is happening during a Type II response?
destruction of cells due to antigen on membrane
What is an example of a Type II: Tissue Specific reaction?
What is happening during a type III response?
antigen-antibody complexes are deposited on vessels or tissues
What is an example of a Type III:Immune-complex reaction?
systemic lupus erythematosus