RHS1 Flashcards
acute vs chornic CO toxicity
acute: bright red
chronic: hypoxic CNS lesions, basal gangia lesions, globus pallidus necrosis
Colorless, Odorless, nonirritating gas.
Carbon Monoxide
-higher affinity for hemogloibibn(turns to carboxyhemoglobbin)
Attaches to and inactivates metalloenzymes
cyanide
-will inhibit cell respiration
Principal toxicity due to inactivation of cytochrome C oxidase
cyanide
acute vs chronic cyanide toxicity
acute effects largest O2 organ demads: brain and heart
chronic: weakness and visual distrubances
binds to the sulfhydryl groups
lead
inhibition of delta-aminolevulinic acid dehydratase and ferrochelatase.
lead
-impares heme synthesis, Zinc-protoporphyrin (ZPP) is formed instead of heme, causing dec IRON
inhibits sodium- and potassium-dependent ATPases in cell membranes
lead
-will make the RBC more fragile and more suceptible to lyse
Competes with calcium for binding to phosphates in bone
lead
-radiodense deposits on bone
burton line
lead deposits on gingiva
Zinc-protoporphyrin (ZPP)
formed when led is in the body and will inhibit iron
vascular sclerosis and stromal fibrosis
ionizing radiation
heat cramps vs heat exhaustion vs heat stroke
heat cramps: loss of electrolytes. normal core temp maintained, cramping of muscles
heat exhaustion: heart nor able to compensate for hypovolemia from excessive sweating. core temp in within safe range and will be brief until water is replenished
heat stroke: failure of thermoreg mechanisms. core body temp above 104. general vasodialation and **sustained muscle contraction from RYR1 dysfunction
what are respiratoyr tract defense enzymes
lysozyme and lactoferrin
what innate defense is used for virus, bacteria, parasite, fungus
virus: lymphocytes and NK
bacteria: macrophages and PMN(neutrophils)
fungi and parasites: mast and eosinophils
MCHC
words for high and low MCHC
-who has a high MCHC, low?
concentration of Hb in a given volume of RBC
hyper and hypochromic
HIGH: HS, SCD
LOW: Iron def(drastic), thalasemia (slight)
gives an idea about how similar or different the RBCs are in size
-word for high variation
Red cell distribution width (RDW)
-anisocytosis (high RDW)
ovalocyte
B12 and Folate Dec (macrocytic)
thassalemia has what shape RBC
target
tear drop
what shape for myelofibrosis, metastatic marrow, megaloblastic anemia
what shpae immune heamolitic anemia, post spleenectomy, HS, severe burns
sphereocyte
what shape microangipathic and mechanical hemolytic anemia
name the dzs
schistocyte
-TTP(neurologic- VWF multimers), ITP(antibodies Gp 2b 3a, factor 4), HUS(Ecoli), DIC
what kind of anemia is having no space in the bone marrow
hypoprolioferative
hemolytic anemia definition
shortened lifespan of RBC and compensatory INC IN EPO, INC IN bilirubin, INC LDH, DEC haptoglobin
hemolytic anemia lab findings on peripheral blood stain
Normochromic normocytic anemia, with polychromasia ± nucleated RBCs.
genes mutated for HS
ankyrin(most common)
spectrin
band 3
band 4.2
what type of cells come up with a speelectomy
holley jowell
cell types seen in G6PD
intra or extra vascular?
heinz bodies (intravascular lysis)
spherocytes
bite cells (extravascular lysis)
drug for SCD
hydroxyurea(inc HbF-dec sickling)
aspleenic infection risks
encapsulated bacteria
H influenza, S pnemonia
bacterimia, spesis, meningitis
babesiosa(will be more symptomatic)
hand foot syndrom(where else is this seen), leg ulcers, priapasm, papillary necrosis, stroke,seizures, ACS, hemochromotosis. gallstones
cardiomyopathy
pulm htn
SCD -vaso-oculsion
hand and foot syndrom also seen in polycethmia vers and essential thrombocytosis
what does salmonella do to one with SCD
osteomyeolitis
types of cells seen in thasselemia
target(micro hypochromo)
basophilic stippling
teardrop
Microcytic hypochromic anemia
Polychromatic cells ± nucleated RBCs
B thasalemia major(nucleated cells!)
w/ almost absent HbA, inc HbF
PIGA mutation stops the synthesis of ..
genetic inheriance
PNH, invovled in the synthesis of GPI/glycolipid(CD55, CD59, C8) anchor
-X linked and only needs one hit
lab finding for PNH
may find pancytopenia(anemia, leukopenia, thrombocytopenia) and ascend CD55 CD59
names of the capsid proteins for rhinovirus
VP1-4
VP7 binds to ICAM
penton base
adenovirus
-with intranuclear inclusions
casual bacterial and viral agent of acute sinusitus /otitis
chronic?
acute bacterial: Strep Pneumonia, H eamofilus influenza (Hib)
acute viral: rhino, corona, adenovirus
chronic: staph aureus
lanceolate/flame-shaped
strep pneumonia
basis of the strep pneumonis vac
capsule, it is also what allows them to escape macrophage via opsonization
Optochin sensitive
strep pneumonia
Positive Quellung reaction
strep pneumonia
-detects capsule
IgA protease
strep pneumonia - contributes to persisiten mucosal colonization(no IgA)
spleen is essential to make IgM instead
compnent of pneumolysin
strep pnemonia
-Cytotoxic for respiratory epithelial and endothelial cells
-Inhibits ciliated epithelial cell activity
-Decreases PMN and inc inflammation
most common cause of chronic otitis media
staph aureus
s pneumonia 23 vaccine for vs other
+65
2-65 with medical condition like aspleenia
19-65 if smoker, copd, CF
-inactivated vaccine from the capsule
other is s.pnemonia 13- conjugate for less than 2 or older than 65
pathologies assocaited with NTHi vs Hib
NTHi= sinusitis, otitis, bronchopneumonia(same as mcat)
Hib= meningitis, spesis, epliglotitis!
tripod
thumb sign, muffled hot potatoe voice
Hib-epilogittitis
key feature of mumps
swollen parotid gland. parotitis/ bull neck
leukocidin
strep pyrogenes induces pus in pharyngitis
Bacitracin sensitive
strep pyrogenes
PYR positive
strep pyrogenes
detection of pyrolidonyl
arylamidase (hydrolysis of L-
pyrrolidonyl-β-naphthylamide)
sand paper rash and strawberry tounge
scarlet fever
-following a strep pyrogenes infection/ strep throat
club shaped, chinese letters, pleomorphic
diptheria
harboring phage-encoded toxin can cause disease
diptheria
GPCR inactivation
tracheal toxin- direct damage
Pertussis/Adenylyl Cyclase Toxin-alters GCPR signaling pathways)
pertussis is A-B inactivates GPCR vis ADP ribosylation to inhibit immune signalling and chemotaxis.
-adenycle cyclase toxin inc camp and inc mucus
Presidposing factors for PIV
child under 5
Asthma
Vit A Def
lack of breast feeding
(Croup)
Steeple sign
narrowing of the traacheal
Croup
Laryngotracheobronchitis
PIV vs RSV peak
PIV peak in fall
RSV peak in winter
Necrosis of the bronchi and bronchioles leads to the formation of “plugs” of mucus, fibrin, and necrotic material within smaller airways.
RSV
Infection can progress to alveolar sacs (atypical interstitial pneumonia) or trigger bacterial secondary super- infections
HMPV dx
bronchitis, bronchiolitis, pneumonia
-ver similar to RSV
RdRp–antivirals
covid
moderna/pzizer vs johnson johnson
M/P: mRNA subunit vaccines encoding Spike protein
JJ: Adenovirus vectors with subunit DNA Spike protein
typical vs atypical carcinoid
typical variant
* Centrally located
* Polypoid growth
* 40 y/o age range
* Obstruction, cough, hemoptysis, infection
* Localized, but can metastasize to lymph
nodes
* Resectable and good prognosis
atypical variant: necrosis and or elevated mitotic count
recombination vs Drift
recombination is sudden and recombination of two strains
drift is gradual from lots of pt mutations
coin lesion
lung harmatoma
-Nodules of connective tissue (cartilage/ fibrous tissue/ fat) along with epithelial clefts.
pink frothy sputum
pulm edema
clinical presentation of ARDS
abrupt onset of dyspenia, hypoxemia, bipateral pulm edema(bilateral pulmonary infiltrates) and absence of cardiac failure
phases of ARDS
day 1-7 = acute, exudative phase (hyaline membrane and heavy lungs)
day 7-21 = organizing, proliferative phase(type 2 proliferation, granulation tissue)
potential scarring 21+
poor prognostic indicators for ARDS
elderly,
spesis, bacteremia,
multisystem organ failure
pi gene, what chromosome
alpha 1 antitrypsin on chrom 14
fate of alpha 1 antitrysin def
accumulation of defective protein in the liver and leads to chronic liver dx
moth eaten appearence
emphysema
both chronic bronchitis and asthma will have Infiltrate of CD8+ T-cells, macrophages and neutrophils with eventually fibrosis. hyperplasia/ hypertrophy, mucus plugging….what distinguishes them
asthma will have eosinophils present
foul smelling sputum
bronchiectisis
lung abcess
bronchiectisis
bronchiolitis obliterans
bronchiectisis
episodic, Paroxysms of cough particularly frequent when the patient rises in the morning
bronchiectisis…change in position causes collections of pus and secretions to drain into the bronchi
Clubbing of the fingers
bronchiectisis
IPF