Strep inf Flashcards Preview

Clin Med 1 Test 3 > Strep inf > Flashcards

Flashcards in Strep inf Deck (20):
1

how is Gr A beta-hemolytic strep throat transmitted

air-bourne secretions

2

4 symptoms of strep throat

fever, tender cervical lymphadenopathy, odynophagia (pain swallowing), possible nausea

3

with what pattern rash does scarlet fever present

similar to a sunburn - superimposed fine papules, mostly in groin and axilla, blanchable, fades 2-5 days with peeling

4

3 HEENT findings for scarlet fever

face flushed, circumoral pallor, enlarged papillae on tongue

5

Ddx for scarlet fever (3)

viral, HIV, diptheria, GC pharyngitis, retropharyngeal abscess

6

what is the sensitivity for blood agar culture of strep throat, what is 2nd choice for testing

80-90%, 2nd choice rapid strep test

7

first DOC for strep throat

benzathine (pen G) 1.2mu IM

8

alternative tx of strep throat (3)

Pen Vk (500mg QID x 10days), Amoxicillin (>500mg BID x 10days), clarithromycin (if PCN allergic)

9

how often do strep infections become rheumatic fever

3%

10

what test should be ordered for rheumatic fever

ASO (stretolysin O titer) to show if recent strep inf (2-4 weeks ago) caused symptoms of rheumatic fever (lattice rash, joint pain)

11

what org causes impetigo

tropical: strep. temperate: staph. but, often co-inf

12

Ddx for impetigo (3)

acute allergic dermatitis, HSV, contact dermatitis

13

tx for impetigo

wash off crust, then apply mupirocin (Bactroban), retapamulin (Altabax) topicals

14

tx for impetigo that is rampant or near the eyes

systemic: cephalexin (Keflex, 250mg BID) or doxycycline (Vibramycin 100mg BID)

15

reason for recurrent impetigo

CA-MRSA

16

tx for Erysipelas of face or with fever (OR subsequent joint inf)

parenteral PCN

17

tx of necrotizing fasciitis

surgical debridement and beta-lactams

18

what condition is a complication of Scarlet Fever

Strep TSS (pyogenic erythrotoxin causes massive release of inflammatory cytokines)

19

prognosis for Strep TSS

skin, soft tissue inflammation, ARDS, renal failure, 80% mortality

20

tx for Strep TSS

beta lactams, ALSO! test contacts for reservoir status