immuno1.21.24 Flashcards
Person makes ab, immunized/infection, memoryie. rubella immunization
active immunity
ab transferred to, no memoryie. neonatal syphilitic IgG ab titer
passive immunity
1st line, immediatenonspecific, no memoryskin,acid,PMNs, NK
Natural, innate
Takes timespecific, memoryT/B cells (cytokines,ab)
Adaptive, acquired,anamnastic
Two parts to adaptive, acquired immunity
cellular, humoral
Kind of immunity…viral,fungal, intracellulartcell/lymphokinestype 4 delayed
cellular
type of immunitybacteria,phagocytosis,extracellulartype 1(immediate)type 2(ADCC,complement)type 3 immune complex
humoral
4 things that make antigens more immunogenic
largecomplexprotein/polysaccharideforeign
4 subclasses of IgG
IgG 1,2,3,4
Immunoglobulin with highest concentration
IgG
Concen immunoglobulins high to low
G>A>M>D>E
Largest antibody
IgM
Pentamer, Jchain, fixes complement the best,1st to appear in neonates
igM
Immunoglobulin on mature cells
IgD
Immunoglobulin type 1 hypersensitivity, histamines
IgE
Monoclonal ab made by
immunizing mousecombining spleen cells w/myeloma cells
Hybridoma
plasma cell fused w/myeloma cells,make monoclonal abs
Most circulating lymphoid cells are… and are…%
Tcells, 80%
5 T cell surface markers
CD…2,3,4, 8,25
CD4 surface markers are… and release…
T helper, cytokines
CD3 surface markers are
associated w/TCR
CD2 surface markers
rosette w/SRBCs
2 Tcell surface markers that are regulatory cells that suppress immune response
CD4,25
CD8 is
cytotoxic
3 surface markers on B cells
CD 19,20,21
2 markers for NK cells
CD 16,56
cells that nonspecifically kill virus infected and tumor cells
NK
Normal T:B cell ratio
8:1
Normal T helper:Tcyto ratio
2:1
AIDs T helper:Tcyto
1:2
which pathway initiated by immune complexes (IgG/IgM)
classical
What consists of 21 proteins that controls inflammation, activates phagocytosis, opsonizesEnhances ability of antibody, phagocytic cells to clear microbes/damaged cells, promotes inflammation and attack pathogen cell membrane
complement
In complement what is the major chemotatic agent
C5a
classical complement proteins and order of binding
C: 1,4,2,3
Most abundant complement protein in both pathways
C3
Alternative complement is activated by
lipopolysaccharides, polysaccharidesPathogen surface
Proteins involved in alternative pathway
C3Factors B/D, H/IProperdin
complement proteins of MAC
C56789
Name of soluble ag+ab forms lattice and visibe precipitate forms
precipitation
Double diffusion(ouchterlony),Single diffusion (radial),Immunoelectrophoresis,Immunofixation All are what kinds of rxns
precipitation
antigen excess is called
postzone
antibody excess is called
prozone
IgE mediated, histamine, mast cell activation (Bee sting,hay fever,asthma) all are what type of hypersensitivity rxns
Type 1, anaphylatic, immediate
Complement mediated cytolysis initiated by ag-abTransfusion rxn,AIHA, Hashimoto, Goodpasture all are what type of hypersensitivity rxn
Type 2, ab-dependent cytotoxicity
IgG at soluble ag, immune complexes damage tissueRA, SLE, serum sickness all are what type hypersensitivity
Type 3 immunie complex
Type 2 is
antibody dependent
Type 1 is
anaphylatic, immediate
Type 3 is
immune complex
Type 4 is
delayed
Ag specific Tcell:TB skin tests, contact dermatitis, poison ivy, GVHD all are what type of hypersensitivity
Type 4 delayed
Two skin tests for allergy
RIST,RAST
What test for IgE
ELISA
Eos/IgE in what type of hypersensitivity
Type 1, anaphylatic, immediate
natural active immunity seen in
infection
natural passive immunity seen in
maternal ab
2 primary lymphoid organs
thymusbone marrow
What type of immunity with skin,mucous,BF
natural
what kind of immunity with vaccines
specific immunityartificial active
adaptive immunity w/ab is called
humoral immunity
immunity inside infected cells
cell mediated
Plasma protein that activates complement system of innate
properdin
enzyme that catalyzes destruction of cell walls of bacteria
lysozyme
signal protein release by cells due to virus
interferon
Subtance that stimulates cell locomotion/migration
chemotactic factor
Cell that kills tumor cells nonspecifically
NK
Have receptors that are specific for a tumor/microbe
cytotoxic cells
Combines to larger carriers to elicit immune response but doesn’t elicit on its own
hapten
Enhances immune response
adjuvant
molecule that can elicit an immune response
immunogen
3 secondary lymphoid organs
spleen,tonsils,lymph nodes
Which 2nd lymph organs respond to antigens by making lymphocytes and plasma cells
lymph nodes contain WBCSspleen makes WBCs,ab
cell that specifically kills tumor cells/virally infectedneeds exposure
T cytotoxic
cell nonspecifically kills tumorinnate/no need exposure
NK
Phagocytosis is main function of what cell
PMNs
Genes that control expresson of HLA antigens are called
MHCmajor histocompatibility complex
3 Class I gene products
HLAA,B,C
5 Class II gene productspresent antigen outside of the cell of T lymphs
HLAD-M,O,P,Q,R
Ab increases during convalescence phase(symptoms disappear, return to normal)
IgG
Ig…best precipitinsoluble ag/specific ab
IgG
Ig..best agglutinin
IgM
has 4 subclasses
IgG
Ig…dimer
IgA
2 Ig…monomer
IgG, E
Ig…pentamer
IgM
2 Ig have Jchain
IgM, A
complement are heat…
labile
complement acts as an…and end result of complement is…
opsonincell lysis
Which ab bind complement
IgG/M
First component to bind to immunoglobulin in recognition phase of complementcan bind bacteria,ab,CRP
C1q
Proteases of complement that don’t bind/aren’t active
Clr/s
Complement component that is chemotactic and anaphylatoxicMediator of inflammation andis released to recruit phagocytes
C5a
Factor B,D and properdin is in what pathway
alternate
IgG ab binds to rbc and is reversible is called
sensitization
clumping ag w/ab after sensitization is called
agglutination (IgM best)
Antigen in agglutination inhibition is…which is bound to
Pt serumab reagent
Positive test for aggulutination inhibition
no aggglutionationPT has antigen(in serum) and reagent ab is bound to serum/antigen so it can’t react with indicator
Negative test for agglutination inhibition
agglutinationPT doesn’t have antigen in serum, and reagent ab isn’t bound thus reacting w/indicator
Two examples of agglutionation inhibition tests
hemaggutination inhibition (rubella)latex agglutination inhibition (viruses)
complement fixation positive test is
no hemolysisno C available, complement is fixed, not available to combine w/indicator (SRBC coated w/antiSRBC)
complement fixation
when complement finds/attaches to antibody-antigen complex
complement fixation negative test
hemolysis:no antibody in serum and complement not bound, attaches to indicator/SRBC+antiSRBC and lyse
What type of rxn/test is ab-ag combined in presence of complement to see if hemolysis occursdetects IgM ab w/sheep RBC/antiSRBC/hemolysin
complement fixation (CF)
…quantitatively determines the level of an antigen. Antibody is incorporated into liquefied agar and allowed to gel. The antigen is added to small wells and radiates throughout the antibody-containing medium, leaving a precipitate throughout the gel. The amount of diffusion is quantified.
radial immunodiffusion (RID)ORsingle immunodiffusion
single immunodiffusion also called
radial immunodiffusion (RID)
Rxn where diffusion occurs and a ring of precipitate forms on an agar plate with ab where serum/standards are added
Radial immunodiffusion(RID)Single immunodiffusion
Fahey(kinetic) and Mancini(end pt) are what kind of tests
RID/immunodiffusion/precipitaition
… … is an agar gel immunodiffusion.It is a special precipitation reaction on gels where antibodies react with specific antigens forming large antigen-antibody complexes which can be observed as a line of the precipitate.In…both the antibody and antigen are allowed to diffuse into the gel.After application of the reactants in their respective compartments, the antigen and the antibody diffuse toward each other in the common gel and a precipitate is formed at the place of equivalence.
Double Immuno-diffusion
Another name for double diffusion
Ouchterlony
Test used to determine relationship between ag-ab Ab is added around ab well and diffussion occurs with precipitation bandsConcentration and rate of diffusion dictates location of bandsUsed to id ab w/autoimmune disorders
double diffusion/ouchterlony
Double diffusion pattern that fuse together is
identity
double diffusion pattern that intersect are
nonidentity
double diffusion patterns that parially intersect are
partial identity
Test where ab-ag diffuse thru agar after serum proteins are electrophoresed on agar
immuno-electrophoresis (IEP)
Serum IEP can detect
monoclonal gammopathies
urine IEP can dectect
Bence Jones protein or free light chains
In this method the sample goes through a complex process called electrophoresis. This process singles out the different proteins in your blood. A dye is used to bind to the proteins and stain them.This method “fixes” certain proteins into place with antibodies and then washes away the others before staining them. On a computer screen, these proteins form a pattern of bands. Peaks and valleys in the bands may mean that you may be making too many or too few of certain proteins. The band pattern is specific for certain diseases.
Immunofixation
protein electrophoresis plus immuno-precipitation is called
immunofixation
Immunofixation is used to classify
monoclonal gammoopathies/determine heavy and light chains
name of test where ab-ag migrate toward each other and forms precipitate
countercurrent immunoelectrophoresisCIE
Two examples of RIA, radioimmunoassay
RIST, RAST
Which RIA measures total IgE
RISTradio-immunosorbent test
which RIA measures IgE to specific allergens
RASTradio-allergosorbent test
Which test is a sanwhich tecnique with ab on solidPT serum addedenzyme labeled abenzyme substrate
EIA/ELISA enzyme immunoassay
HIV/Serum HcG/hepatitis mreausred by
EIA/ELISA
EMIT measuresenzyme multiplied immunoassay
small molecules like drugs, hormonesThe enzyme multiplied immunoassay technique (EMIT) is one of the more common drug screening platforms.
Positive EMIT is
colorA change in absorbance is measured at 340 nm by a spectrometer In this enzyme immunoassay (EIA), NAD is reduced to NADH when it reacts with the enzyme G6PD.
Negative EMIT is
no color
Test where insoluble complexes reflects scattered light
nephleometry
FTA-ABS STANDS FOR…TETS FOR…TO…
FTA-ABSFluorescent Treponemal Antibody ABS: absorptionpresence of antibodies to Treponema pallidum
Type of immunohistochemistry technique that utilizes fluorophores to visualize various cellular antigens such as proteins.
Immunofluorescence (IF)
ANA and FTA-Abs can be tested with
immuno-fluorescencefluorescein labeled ab
Positive FPIA
reduction of polarized light
negative FPIA
increased polarized light
FPIA stands for
Fluorescence polarization immunoassay
Time frame to test for infectious disease
acute and convalescent specimens 2weeks apart
Clinically sig titer for infectious disease is
4-fold or 2 tube rise
Ability of test to detect very small amount of a substancwe
sensitivity
ability of test to give positive result if PT has the disease-less false neg
sensitivity
ability of test to detect substance without interference from cross reacting substances
specificity
ability of test to give neg result if PT does not have disease-less false pos
speficity
Name of principle where if person has ab to virus, the virus on the RBCs added will be neutralized and inhibit agglutination
hemaaglutination inhibitionAg are on rbcs
a substance in the blood of persons with syphilis responsible for positive serological reactions for syphilis an antibody (such as IgE in humans) that mediates hypersensitive allergic reactions of rapid onset
reagin
fusing B lymphs w/a plasma myeloma cell is how you make
monoclonal ab
binding strength of single sitesingle antigenic determinent + individual ab
affinity
total binding strength, multivalent ag-b
avidity
reproducible technique for quantitation of a single protein, and is also applicable in a protein mixture. The quantitation is based on measuring the height of the precipitate peak.
one dimensional single electroimmuno-diffusion
one dimensional single electroimmunodiffusion also called
rocket electrophoresisLAURELIn rocket immunoelectrophoresis, antigen migrates in an electric field in a layer of agarose containing an appropriate antibody.
fluorochrome that gives minimal false reading and is green
fuorescein(isothiocyanate)
fluorochrome gives off red at 580nm
tetra-methyl-rhodamine isothicyanate
…tests are an indirect method in that they detect biomarkers that are released during cellular damage that occurs from the syphilis spirochete. …are screening tests, very rapid and relatively simple, but need to be confirmed with…
Nontreponemalconfirm with treponemal tests
….tests look for antibodies that are a direct result of the infection thus, IgG, IgM and to a lesser degree IgA.
Treponemal
The nontreponemal antigens in syphilis are
cardiolipin and lecithin
The VDRL antigens are
cardiolipin and lecithin
Nontreponemal antibody
reagin
…is a fundamental process utilized to facilitate the aggregation of small particles in a liquid or solution to form larger clusters, known as flocs.
Flocculation
VDRL
venereal disease research laboratory
Ab-ag rxn in VDRL test is what type
flocculationThe VDRL test doesn’t look for the bacteria that cause syphilis. Instead, it checks for the antibodies (reagins) your body makes in response to antigens produced by cells damaged by the bacteria.
Which requires heat inactivation, VDRL or RPR
VDRL
In VDRL, each serum sample must be heat-inactivated for…minutes at …prior to testing. If heat-inactivation occurs more than four (4) hours prior to testing, reheat the serum for an additional …minutes at…
Heat inactivate for 30 min at 56CIf >4hrs, reheat 10min at 56C
antigens for RPR
cardiolipin + charcoalThe rapid plasma reagin (RPR) test uses the same antigen as VDRL, but the antigen is bound to a carbon particle to allow visualization of the reaction without a microscope.
reactive RPR forms
black clumps
two nontreponemal tests/reagin tests
VDRL/RPR
Reiter strain serves as a …. in FTA-ABSFluorescent Treponemal Antibody ABS: absorption
absorbent, removes nonspecific ab
In FTA-ABS, what strain is used with serum after absorbed off
NicholsFTA-ABS test system employs nonviable T. pallidum (Nichols strain) cells as a substrate (antigen).
Name of test1.)Absorb ab, Reiter2.)Add Nichols, serum3.)label, fluorescein
FTAfluorescent treponemal ab absorption
most sensitive tests for syphillis
FTS-ABS and EIisa
MHA-TP
Microhemagglutination-Treponema pallidumdetects antibodies
Less likely to be reactive in primary,secondary syphillis in which test
MHA-TPMicro agglutination
Test name that detects treponemal abremove nonspecific ab w/sorbent, react serum w/Nichols strain of pallidium, add fluorecein label
FTA-ABsfluorescent treponemal ab absorptoin test
Test you add live treponemes to PT serum
TPItreponema pallidium immobilization testp
positive TPI
treponemes immobilized
MHA-TP used to detect
ab to T.pallidium
in MHA TP what is PT serum added to
SRBCs sensitized w/T.pallidum
positive MHA TP
agglutination, ab
TP-PA uses what kind of particles
gellatin
Which microflocculation test is screen for CSF syphillis
VDRL
Whici microflocculation test for syphillis does not require heat
RPR
Virus that causes infectious mononucleosis
EBVepstein barr virus
What does the screen for EBV test for
heterophile ab
What is a positive rxn for EBV using the screening rapid diff slide test
greater agg in kidney absorbed cells
What are the indicator cells for the EBV screen rapid diff slide test
Sheep, RBCs
What is the confirmation test for EBV
Tests for ab such as ELISA, CLIA
In CLIA test to confirm EBV, what stage of infection is it when there is a presesnce of IgG/IgM + anti-VCA in absense of anti-EBNA
current or recent
anti-VCA IgM/IgGanti-EAanti-EBNA all are antibodies to what virus
EBV
Anti-EBNA and IgG anti-VCA w/out IgM anti-VCA indicate what stage of infection of EBV
past
Name 5 streptococal ag
streptolysin, streptokinaseDNase: deoxyribonuclease BNADaseHyaluronidase
Streptozyme test:Kind of rxn, what it tests for, reagent used
hemagglutionationtests for abSRBC
Name of specific neutralizaton test for antibody made in group A strep infection
Anti-DNase B test
What is a positve rxn in the anti-DNase B test
green color
Test name where strep abs prevent the lysing of group O rbcs by neutralizing
Anti-streptolysin O neutralization test
What indicates presence neutralizing ab in the anti-strepolysin O neutralizing test
Dilution of last tube shows no hemolysis
Name of reciprocal of dilution of last tube in anti-streptolysin O neutralization test
Todd units
Two tests for strep A antigens
LFA Molecular testing for DNA
What is used to screen for HIV-1 ab
ELISA
2 ways to Confirmation for HIV
Western blotNucleic acid testing
Name of retrovirus that attackes CD4 cells
HIV-1
Cause of CMV
herpes virus
Testing for CMV
ELISA
HepB serology involved in acute phase
HBsAg, HBeAg
Hep B serology involved in early recovery
anti-HBc IgM