Micro/Immuno Flashcards
polymyositis hypersensitivity
type IV
infectious RNA type
+SSRNA
asplenia susceptability
encapsulated organisms
MUCOR association
diabetic ketoacidosis(forms black pus)
koplik spots(grey specs on buccal mucosa)
rubeola(paramyxovirus)
scleroderma antibodies
anti-topoisomerase(Scl-70)&anti centromere(CREST)
india ink stain
cryptococcus neoformans
legionella tests
silver stain, buffered charcoal yeast(iron/cysteine)
NADPH oxidase deficiency susceptability
catalase+(Pseudomonas, Listeria, aspergillus, candida, staph, ecoli)
protein A function
bind Fc region of Ig(s. aureus)
shiga(or shiga-like) toxin MOA
inhibit 60s ribosome(remove adenine from rRNA)
rheumatic fever criteria
j<3nes (joint arthritis, carditis, subQ nodules, erythema marginatum, sydenham chorea)
CAMP factor
strep agalactae(promote s aureus growth)
EF2 toxin
diptheria toxin, pseudomonas exotoxin A
clostridium toxins
tetani-block GABA release, botulinum-block Ach release, perfrigens-lecithinase like phospholipase C, difficile-A binds brush border, B destroys enterocytes
bacillus anthracis capsule
polypeptide- d glutamate
tumbling motility&Tx
listeria(actin rockets), ampicillin(neonates/immunoC)
sulfur granules&Tx
actinomyces-penicillin
mid-lung Ghon/hilar nodes, virulence factor
primary TB, cord factor(inhibit M0 maturation)
secondary TB&extrapulmonary sites
upper lung caseous granuloma, Potts-vertebrae, CNS, renal, GI, lymph
lepromatous vs tuberculoid
L-diffuse, TH2 mediated, T-few plaques, TH1 resonse
pink on McConkey
lactose fermenter(main bugs-Klebsiella/Ecoli)
gonorrhea/meningitidis sequelae
fitz-hugh-curtis(liver adhesions), waterhouse-friedrichson
cherry red epiglottis bug/growth media/capsule type
Hib- chocolate- X(heme) and V(NAD+), polyribosylribitol
sorbitol non-fermenting Ecoli
EHEC(0157-H7)
abdominal rose spots
salmonella typhi(gall bladder carrier)
campylobacter growth/associations
42C, comma shape oxidase+, Guillain Barre
salmonella vs shigella
salmon-flagella&H2S+, shigella-intracellular
flu, jaundice, photophobia, conjunctivitis
Leptospira(weil disease=same+azotemia/hemorrhage)
Lyme vector & stages
ixodes tick, 1-bullseye rash 2-AV block/facial nerve palsy 3-arthritis/encephalopathy
painless chancre+test
primary syphillis(VDRL)
rash on palms& soles, condyloma lata(genital/anal warts)
secondary syphillis
tertiary syphillis symptoms
gummas, argyll robertson pupil, tabes dorsalis, aortitis
flea diseases
Rickettsia typhi, Yersinia pestis(plaugue via rats)
louse diseases
rickettsia prowaseckii(typhus), borrelia recurrentis
strawberry tongue/face sparing rash
scarlet fever
gardnerella discharge
gray, fishy, clue cells
mycoplasma cell, growth& location,
no wall, sterol membrane, eatons agar, prison/military
chlamydia trachomatis serotypes
A-C=Chonic African Blindness, D-K=typical STD+neonatal disease, L-lympogranuloma venerum
chlamydia infection/growth/cell wall
Elementary(enter), reticular(replicate), Giemsa stain or fluorescent AB, wall has no muramic acid
palm&sole rashes
CARS(coxsackie A, RMSF, 2Syphillis)
cytoplasmic morula diseases&vectors
granulocyte=anaplasma, monocyte=erlichia, ticks
animal placenta disease
coxiella burnetti(Q fever)-pneumonia
Typhus causes/disease
endemic-rickettsia typhi(flea), epidemic-R. prowazekii (louse), Trunkal rash that spreads spares palms/soles
general mycosis disease/Tx
pneumonia, fluconazole=local, amphotericin B systemic
specific mycosis findings
histoplasma-hides(in M0), blastomyces-broad based budding(granulomatous), coccidio-crowds(endospores), paracoccidio-captains wheel around RBC
Spaghetti& meatball KOH prep
tinea versicolor(malessezia furfur)-hypopigment
ringworm(tinea) organisms
microsporum, trichophyton, epidermophyton
Fungal branching differences&diseases
45/acute=aspergillus(lung granuloma), wide angle=mucor (black from nose then brain-diabetics)
cryptococcus neoformans tests/pathology
india ink stain/latex agglutination test, meningitis/soap bubble brain lesions
opportunistic fungi
candida, aspergillus, cryptococcus, mucor, pneumo jirovecii, sporothrix schenkii
ascending lymph swelling disease/cause
sporothrix schenkii, rose gardner (1st local ulcer/pustule)
disc-shaped yeast w/ diffuse interstitial pneumonia
pneumocystis jirovecii
foul smelling, fatty diarrhea bug/findings
giardia, trophozoites/cysts in stool(protozoa)
entamoeba histolytica findings/diagnosis
bloody diarrhea/liver abscess(anchovy paste exudate), plasma trophozoites/stool cysts(look like eyes)
acid fast trophozoite cysts disease
cryptosporidium(mild diarrhea/severe in AIDS)
brain abscess ring-enhancing lesions disease/cause
toxoplasma, cat feces cysts
naegleria disease/source
rapidly fatal meningoencephalitis, freshwater lakes amoebas enter through cribiform plate
tsetse fly disease/diagnosis
trypansoma-african sleeping sickness/recurrent fever, blood smear
maltese cross/ring form disease/vector
babesia, fever/hemolytic anemia, ixodes tick
malaria transmision/diagnosis
mosquito(anopheles), trophozoite ring form blood smear
malaria types/differences
plasmosium. vivax/ovale=48hr cycle, malariae=72hr cycle, falciparum=severe w/irregular fevers, kidney/lung/brain.
kissing bug disease
chagas disease trypansoma cruzi(dilated CMO/colon)
green vaginal discharge disease
trichomonas(trophozoites)
leischmaniasis disease/vector/diagnosis
fever/hepatosplenomegaly, sandfly, M0 w/amastigotes
roundworm, tapeworm/fluke Tx
bendazoles/pyrantel pamoate. praziquantel
pig/fish/dog worms
taenia solium(GI), diphyllobothrium(B12 deficiency), echinococcus(liver casts)
fluke transmissions
schistosoma-snails(liver/spleen granulomas, bladder CA), chonorchis-fish(gallstones), paragonimus-crab(lung)
live attenuated vaccines
sabins, yellow fever, smallpox, chickepox, MMR, nasal flu
recombinant vaccines
HPV, HBV
only ssDNA virus
parvovirus(part-of-a virus)-B19
non-linear DNA viruses& examples
papilloma, polyoma(JC/BK-junk cerebellum bad kidney), hepadna(HBV)
only dsRNA virus
reovirus(rotavirus=common diarrhea villous destruction)
only virus not replicating in host nucleus&examples
pox(carries own RNA polymerase) smallpox, molluscum, cowpox
DNA virus pneumonic
HHAPPPPy(Herpes, hepadna, adeno, parvo, papilloma, polyoma, pox)
Herpesvirus strains
HSV(1 oral 2 genital), VZV, EBV, CMV, roseola-HHV6/7, HHV8-kaposi
pink eye cause
adenovirus(also pharyngitis/pneumonia)
negative stranded viruses
(always bring polymerase or fail replication) arena, bunya, paramyxo, orthomyxo, filo(ebola), rhabdo(rabies)
picornavirus diseases
PERCH-polio, echo(meningitis), rhino(common cold), coxsackie, HAV
paramyxoviruses&virulence
PRM-parainfluenza(croup), RSV, measles&mumps. fusion protein=multinucleated respiratory epithelium)
flavivirus examples(flavi=yellow)
yellow fever(Aedes mosquito), dengue, stl encephalitis, west nile, HCV
togaviruses
Rubella, equine encephalitis’
segmented viruses
BOAR(bunya, orthomyxo, arena, reo)
EBV vs CMV &associations
CMV-owl’s eye, negative monospot. EBV-heterophile AB, burkitts, hodgkins, nasopharyngeal CA
Tzanck test(opened vesicle)
finds giant cells=Herpes(also PCR, cowdry A inclusions)
measles pathology
koplik spots(white mouth lesions) then descending rash
bullet shaped virus
rabies, Negri bodies-cerebellum purkinje cells
Hep B signs of chronic infection, immunity, transmission
IgM=acute, IgG=chronic, antiHBs=immune, antiHBe=low transmission, HBeAg-high transmission, HBsAg-active infx
prion forms
PrPc=normal protein, PrPsc=beta sheets can’t degrade
HIV/AIDS tests
ELISA then western blot, CD4<200=AIDS, viral load
HIV structural genes
env(gp41=fusion/entry, gp120=attach), gag(capsid), pol(reverse transcriptase, aspartate protease, integrase)
HIV immune mutation
CCR5(virus binds CCR5-early, CXCR4-late in Tcells, and CD4 &CCR5 in M0)
HIV disease w/CD4 <200
pneumocystis jirovecii, JC, cryptosporidium
HIV disease w/CD4 <100
histoplasma, esophageal candida, toxoplasma,
HIV disease w/CD4<50
mycobacterium avium-intracellulare, CMV, cryptococcus
most common mimicking appendicitis
yersinia enterocolitica(salmonella/campy can)
congenital infections mother to fetus
toxoplasma, rubella(PDA, cataracts, deaf), CMV(seizures, blueberry muffin rash), HIV, HSV2, syphilis(stillbirth or facial abnormalities, saber shins, CN VIII deafness
head-toe rash preceded by conjunctivitis, coryza, cough
Measles(also buccal koplik spots)
palms&soles rash+oral ulcers
coxsackie A(hand foot mouth)
trunk to face/extremity rash-different stage lesions
VZV(chicken pox)
several days of fever then body rash
HHV6(Rubeola-can cause seizures)
fever, rash, sore throat
strep pyogenes(scarlet fever)
head-toe rash w/ postauricular lymphadenopathy
rubella
facial rash only
parvo B19(slap cheek)
sulfur granules
actinomyces(oral, branching rods)
PAS stain+
tropheryma whipplei
thymus selection sites
positive(MHC restriction)-cortex, negative(self)-medulla
HLA-A3
hemochromatosis
HLA-B27
PAIR(Psoriasis, ankylosing spondylitis, IBD, Reiters)
HLA-DQ2/8
celiac disease
HLA-DR2
MS, SLE, goodpastures, hay fever
HLA-DR3
T1DM, Graves
HLA-DR4
RA, T1DM
HLA-DR5
B12 deficiency, Hashimoto’s
B7/CD28 function
costimulatory signal(activate Th cells along w/MHC-TCR)
B cell activation
CD40-ligand &MHCII-TCR
IL1-5 functions
Hot TBonestEAk(1-fever/inflammation, 2-activate T cells, 3-bone marrow growth/differentiation, 4-IgE/Th2-inhibit Th1/B cell growth, 5-IgA/B cell differentiation/eosinophils
Th1/Th2 secretions
IFN-gamma, IL4,5,10,13
Regulatory Tcell markers/function
CD3,4,25, anti-inflammatory release IL10/TGF-beta
IgM characteristics
Immediate response, pentamer, on B cells
specific complement functions-C3b,3a,5a,5b-9
3b-opsonize(bind bacteria), 3a5a-anaphylaxis, 5a-neutrophil chemotaxis, 5b-9-MAC cytolysis
C1 esterase inhibitor deficiency
hereditary angioedema(NO ACE inhibitors)
C3 deficiency
recurrent sinus/respiratory infections, T3HS reactions
C5-9 deficiency
neisseria infections
DAF deficiency
lysis of RBCs&paroxysmal nocturnal hemoglobinuria
IL-6, 8, 12
6-fever/acute phase proteins, 8-neutrophil chemotaxis, 12-activates NK cells, differentiate into Th1
immune response modulators
IL-10(inhibits activated T/Th1), TGF-beta
interferon functions
antiviral(alpha/beta- degrade viral mRNA, gamma-activate MHC/APC-M0/Th1
M0 cell markers
CD14(LPS activates), 40
Bugs needing preformed AB Tx
Tetanus/botulinum toxin, HBV, Rabies
Type II HS reactions
AI hemolytic anemia, ITP, acute transfusion rxn, rheumatic fever, Goodpastures, bullous pemphigoid, pemphigus vulgaris, erythroblastosis fetalis, pernicious anemia
Type III HS reactions
SLE, polyarteritis nodosa, Post-strep glomerulonephritis, serum sickness, arthrus reaction
Type IV HS reaction
MS, Guillain Barre, graft vs host, PPD, contact dermatitis
SLE antibodies
smith/dsDNA, ANA(histone=drug induced lupus)
scleroderma antibodies
Scl-70(DNA topoisomerase I), centromere
anti-Jo1, SRP, mi-2, CK-MM
dermato/polymyositis
Anti SSA/B(Ro/La)
Sjogrens syndrome
p-ANCA
Churg-Strauss/microscopic polyangiitis
anti-mitochondrial antibodies
primary biliary cirrhosis
anti smooth muscle antibodies
autoimmune hepatitis
anti-endomysial/tissue transglutamase
celiac disease
anti-basement membrane antibodies
goodpastures disease
anti-U1 RNP
mixed connective tissue disease
x-linked agammaglobulinemia(Brutons)
BTK defect-no B cell maturation-recurrent bacterial infections after 6mo(opsonization defect)
selective IgA deficiency
asymptommatic or mucosal infections, blood product anaphylaxis. normal Ig besides low IgA, false+ b-HCG
tetany, recurrent viral/fungal infections, heart/great vessel defects, low Ca/PTH/T cells
DiGeorge(22q11 deletion) failure to develop 3rd/4th pharyngeal pouches
coarse facies, staph abscesses, retained primary teeth, high IgE, eczema
Hyper-IgE(Jobs syndrome) Th1 cells fail to produce IFN-gamma(neutrophils can’t respond to chemotaxis)
albino, peripheral neuropathy, recurrent staph/strep
chediak-higashi syndrome-LYST-phagosome-lysosome fusion microtubule dysfunction
recurrent pusless bacterial infections, delayed umbilical separation
Leukocyte adhesion deficiency-LFA-1 integrin protein defect on phagocytes
Thrombocytopenic purpura, infections, eczema, high IgE, low IgM
Wiskott-Aldrich syndrome-X-recessive WAS gene, unable to reorganize actin cytoskeleton
hyper-IgM syndrome
defective CD40L on helper Tcells-no class switching
ataxia-telangiectasia
ATM gene defects-DNA repair enzymes, cerebellar defects, spider angiomas, IgA deficiency, high AFP
SCID types
IL2-R, adenosine deaminase deficiency, no thymic shadow/T/B cells Tx-bone marrow transplant
drug causing gingival hyperplasia, high BP/lipid/sugar, nephrotoxic, hirsuitism
cyclosporine(bind cyclophilins-inhibit calcineurin)
tacrolimus/sirolimus(rapamycin) MOA
inhibit cyclosporin inhibiting calcineurin. inhibits mTOR
azithioprine MOA
precursor antimetabolite of 6-MP-toxic to proliferating lymphocytes(allopurinol interaction)
Therapeutic antibodies specific targets
muronomab-CD3, infliximab/adalimumab-TNFa, abciximab-glycoprotein IIb/IIIa, trastuzumab-HER2, rituximab-CD20, omalizumab-IgE
Meningitis differentiation
fungal vs bacterial(lymphocytes vs PMNs), viral= normal glucose, lymphocytes
viral UTI’s
adenovirus, BK virus, CMV
HiB vaccine coverage
meningitis, sepsis, epiglottitis, pneumonia(no sinusitits, otitis media, conjunctivitis)