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5
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what is the offending allergen in Toxicodendron?
Urushiol oil
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baam
Lose 10 points!
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rocket
Go to first place!
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fairy
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25
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banana
Go to last place!
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5
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how do you diagnose toxicodendron dermatitis?
Clinically by look of skin and by HPI from patient but no need for special testing (skin test)
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5
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What is the sensitization phase in allergic contact dermatitis?
Haptens penetrate epidermis->activate langerhan cells->lymph nodes->activate naive T cells
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5
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what do CD4+ helper T cells release?
cytokines
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5
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What is humoral immunity?
adaptive immunity where B cells secrete antibodies
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5
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What is the most common cause of contact dermatitis?
Toxicodendron dermatitis
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5
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What type of dermatitis is Toxicodendron dermatitis?
Contact Dermatitis (allergic contact)
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baam
Lose 25 points!
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fairy
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rocket
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thief
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25
5
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Define type IV Hypersensitivity reaction
delayed cell-mediated immune reaction; involves T cells (CD4 or CD8) with antigens
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5
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Define Type III hypersensitivity reaction
reaction mediated by immune complexes
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5
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most common signs and symptoms of poison ivy dermatitis are
Intense itching; Skin swelling and blisters; Skin redness
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5
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What is a hapten?
low molecular weight antigen
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Do CD4+ helper T-cells recognize MHC I or II?
MHC II
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what type of cell responds to the haptens going through the skin?
Langerhan cells (APC -antigen presenting cell)
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thief
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25
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shark
Other team loses 10 points!
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fairy
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lifesaver
Give 10 points!
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