Allergy, Immunology, Poisoning Flashcards

1
Q

child in impoverished neighborhood, language regression and anemia due to =

results from inhibition of ferrochelatase and _________, and leads to elevated zinc protoporphyrin levels

A

lead toxicity

delta - aminolevulinic acid dehydratase

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2
Q

hepatitis B virus does not have a cytotoxic effect itself, however, the presence of viral HBsAg and HBcAg on the cell surface stimulate the host’s __________ to destroy infected hepatocytes

A

CD8+ CTL

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3
Q

skin rash, photosensitivity, arthralgias, renal disease in 23 year old caucasian female =

antibodies include ANA, anti smith, and _______

A

SLE

anti-dsDNA

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4
Q

acute salicylate intoxication typically presents with nausea/vomit, confusion, dizziness, ______, fever, and tachypnea. Patients present with respiratory ________ which occurs first, resulting in increased ventilation and loss of CO2 as salicylates directly stimulated medullary respiratory center. Then __________ begins to develop 12 hours later, which will present with an acidotic pH with both low plasma HCO3 and PaCO2.

A

Tinnitus

alkalosis

anion gap metabolic acidosis

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5
Q

recurrent episodes of colicky abdominal pain and facial swelling likely has ______ due to ________ deficiency. It causes increased cleavage of C2 and C4 and results in unchecked conversion of kininogen to ________ resulting in increased levels and angioedema

A

angioedema

C1 inhibitor deficiency

bradykinin

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6
Q

the structure genes for pilus proteins (gonococci virulence) undergo _____________ at a high frequency, preventing long lasting immunity from developing

A

antigenic variation

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7
Q

boy with fever, chills, rash, sore throat, diffuse eyrthematous rash on chest and abdomen that blanches with pressure, numerous 1-2mm papules. The throat is erythematous with gray white tonsillar exudates and tongue is bright red =

due to

predisposes to __________ and glomerulonephritis

A

Scarlet fever

Group A streptococcus (pyrogenic exotoxins)

acute rheumatic fever

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8
Q

treatment for diphtheria (fever, difficulty breathing, no vaccinations, neck swelling, gray pharyngeal exudate) include _________, Abx, and active immunization. Of these, _________ with antitoxin is the most important

A

passive immunization

passive immunization

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9
Q

nonpathogenic Corynebacterium diphtheriae can cause severe pseudomembranous pharyngitis after acquiring the ____ gene via lysogenization by a temperate bacteriaphage

A

Tox

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10
Q

_________ can cause severe constipation and should be suspected if patients are residing in a home built before 1978. Diagnosis made by measuring the patients blood level

A

lead poisoning

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11
Q

________________________ associated with IgA and C3 deposition is typical of HSP. Most common in kids 3-11 with recent infection. Present with palpable skin lesions with or without __________ and _________. Should be carefully observed for glomerulonephritis

A

Small vessel leukoclastic angiitis

abdominal pain, arthralgia

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12
Q

acute pruritic rash, history of environmental allergies and hives =

triggered by IgE dependent ______ degranulation

in older patients, _________ such as diphenhydramine, chlorpheniramine, hydroxyzine, promethazine) should be avoid while newer generation antihistamines such as _______ and cetirizine should be used

A

urticaria

mast cell

1st gen antihistamines

loratadine

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13
Q

the HiB vaccine consists of a capuslar polysaccharide conjugated to a carrier protein ________ or outer membrane protein of Neisseria meningitidis. Protein conjugation causes a ___________ leading to long term immunity through the production of memory B lymphocytes

A

Tetanus toxoid

T cell mediated immune response

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14
Q

the most important opsonins (coating proteins) are IgG and ______

A

C3b

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15
Q

nasal mucosa ulcers and glomerulonephritis are most characteristic of -________

_____________are virtually pathognomonic

smooth muscle cell antibodies are seen in ________

GBM antibodies are seen in ___________

A

granulomatosis with polyangiitis (Wegener’s)

c-ANCA (antineutrophil)

autoimmune hepatitis

Goodpastures

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16
Q

most adverse drug reactions are _______. Unpredictable reactions are less common and are due to genetic differences, immune interactions, or other mechanisms

A

predictable

17
Q

Most available rodenticides contain brodifacoum (similar to warfarin). Patient who ingested significant quantity requires immediate treatment with ________ in addition to vitamin K

A

fresh frozen plasma

18
Q

__________ and _________ are the major cause of morbidity and mortality from theophylline intoxication with with the former being the most significant

A

seizures

tachyarrhythmias

19
Q

___________ is the major virulence factor of Streptococcus pyogenes. It inhibits phagocytosis and complement activation

A

Protein M

20
Q

________ should be avoided in patients who have low C1 esterase inhibitor activity due to risk of angioedema

A

ACEI (captopril)

21
Q

anaphylactic shock is characterized by vasodilation, increased vascular permeability, bronchoconstriction. _______ counteracts these physiological meachanisms and is the drug of choice for this

A

epinephrine

22
Q

_______ is an essential protein in the activation of IL2, which promotes the growth and differentiation of ______. Immunosuppresants such as cyclosporine and tacrolimus work by inhibiting its activation

A

calcineurin

23
Q

wheal and flare lesions (bee sting) result from allergic _____ reactions. Initial exposure promotes antibody class switching to IgE. following exposures result in mast cell degranulation of _________

A

Type 1 HSR

histamine

24
Q

septic shock is due primarily to the actions of ______, IL1 and IL6

A

TNF alpha

25
Q

_________ is a relatively specific marker for mast cell activation and is elevated in anaphylactic shock

A

tryptase

26
Q

the high affinity IgE receptor (FceRI) is found on the surface of mast cells and basophils and normally binds the Fc portion of circulating IgE Abs. Cross linking of multiple membrane bound IgE Abs by a multivalent antigen results in ___________, causing degranulation

A

aggregation of FceRI receptors

27
Q

the triad of __________ is nongonococcal urethritis, conjunctivitis, and arthritis. It is an HLA - _____ assocaited arthropathy. It can cause ______ in about 20% of cases

A

reactive arthritis

B27

sacroiliitis

28
Q

Hyperimmunoglobulin M (hyper IgM) syndrome results from defective Ig class switching due to a defect in ___________ interaction. Absence of ________ is the most common cause and is inherited in an X linked Recessive pattern. Clinical features include recurrent sinopulmonary, GI, and opportunistic infections

A

CD40-CD40L

CD40L

29
Q

Pneumococcal conjugate vaccines are strongly immunogenic in infancy due to both ________ recruitment. The pneumococcal polysaccharide vaccine is poorly immunogenic in infants due to their immature ___________

A

B and T cell

humoral immunity response

30
Q

patients can develop ___________ from high nitroprusside infusion, and presents with altered mental status, seizures, CV collapse, lactic acidosis, and bright red venous blood. Antidotal treatment can be achieved by 3 strategies:

Direct binding of cyanide ions:

induction of methemoglobinemia:

and use of detoxifying donors (_____):

A

cyanide toxicity

hydroxocobalamin

sodium nitrate

sulfur; sodium thiosulfate