MIDTERM Flashcards
(100 cards)
what is the chain of infection?
remember in order
- infectious agent ; disease causing microorganisms bacteria, viruses, protozoa, fungi, parasites
- reservoir; where pathogens live and thrive
- portal of exit; how pathogens leave reservoir
- mode of transmission; how pathogens travel to host
- portal of entry; how pathogens enter host (bodily openings)
- susceptible host; someone who can get sick easily
what is the first line of defense in a infection and inflammatory process? give examples
skin and mucus membranes; skin the largest organ that stops pathogens from entering body, snot or ear wax trapping pathogens from entering further
what is the second line of defense in the inflammatory and infections process?
inflammatory response after pathogens enter body; warmth, redness, and swelling of the site appear to indicate a infection
immunocompromised patients are…
more prone to getting sick because of their decreased immunity
are at increase risk for
- bacterial
- fungal
- viral infection
- parasitic infection
organs of the immune system
- leukocytes
- thymus and bone marrow
- lymph nodes
- spleen
- liver
leukocytes
white blood cells
neutrophils, monocytes, macrophages are what type of WBC
phagocytes “eating cells”…eat bad things
thymus gland
located in mediastinum (between lungs) makes t cells (remembering cells, they remember how unwanted cells look and kill them)
bone marrow
found inside certain bones “birthplace” of blood, WBC, RBC, platelets
lymph nodes
filter bad substances that go through the lymphatic fluid; also have lymphocytes to help fight infections and diseased
spleen
stores RBC’s and activates lymphocytes
liver
clears pathogens from body
Why is it beneficial for nurses to use maslow’s hierarchy of needs when planning care?
help prioritize patients needs
Innate immunity (natural/nonspecific immunity)
present at birth like first line of defense baby’s nose hairs not letting anything enter, the HCL acid in baby’s stomach; also nonspecific so they wide range of cells
acquired immunity (specific immunity)
developed after direct contact with a antigen through illness or vaccination; that’s why there specific because they remember what “covid” cells look like fighting them before it impacts the body
what are the 3 chemical mediators
these substances are released during a injury or infection
- prostaglandins
- histamine
- leukotrienes
prostaglandins
promote inflammation by increasing blood flow
histamine
released by basophils during an allergic reaction widens blood vessels (vasodilation)which leads to redness and warmth of area, and vasodilation causes vessels to start leaking causing edema (vascular permeability)
leukotrienes
narrow airways causing it harder to breath like allergic reactions or asthma, also has vascular permeability which causes edema (swelling)
cytokines & eicosanoids
cause blood and blood vessels to change directing blood to site of injury/infection
cortisol
hormone produced by adrenal cortex that’s anti-inflammatory
kinin system
produces bradykinin that controls the contraction and dilation of blood vessels
S&S of inflammation
local; localized to injured area like swelling, redness, pain, and heat which could lead to the loss of function like spraining your ankle
systemic; related to whole self causing fever, headaches, chills, sweating, muscle aches like covid you get chills, fevers ect. its not possible to get a fever on just your thumb
one-celled microorganisms
portozoa