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Derm Infxns 1
Infections Part I
Question | Answer |
---|---|
What vaccines should not be given to an HIV-positive pt? | Live vaccines (except for MMR under certain conditions): VZV, intranasal flu, oral polio. Also yellow fever, BCG, anthrax, oral typhoid, small pox |
What is the tx for TTP? | Large-volume plasmapheresis, steroids |
Compare the serum iron, ferritin, and transferrin levels in iron defic anemia to anemia of chronic dz. | IDA: low serum iron, low ferritin, high transferrin. AOCD: low serum iron, high ferritin, low transferin |
Flat spot <1cm | macule |
flat spon >1cm | patch |
solid, elevated lesion <1cm | papule |
same as papule but >1cm and flat-topped | plaque |
palpable, solid lesion >1cm and not flat topped | nodule |
elevated, circumscribed lesion <5mm containing clear fluid (small blister) | vesicle |
same as vesicle but >5mm (large blister) | bulla |
itchy, transiently edematous area | wheal |
Name the different abx regimens to treat a skin abscess with presumed MRSA. How long to treat? | Combo of bactrim, clinda, mino or doxycycline + rifampin. OR linezolid by itself. Treat for 10-14d. |
Pt admitted to the ICU for fluid resusc and monitoring following trauma w/sig blood loss. The skin around the central line placed in the ER days ago is now red and warm. Pt has fever and wt ct. What is the cause? | Central line infxn caused by staph cellulitis |
A 44yo AAW is in the office for eval of an area of inflammation in her L axilla. Initially area was itchy but is now painful. On exam, area has 6 papules and nodules that are erythem, indurated, and warm. Skin is fluctuant, and drainage is noted. Tx? | Abx and surgical I&D. Pt has hidradenitis. |
When should abx be used in the tx of skin abscesses? | Abscesses >5cm and high risk of complications |
What are the characteristic features of necrotizing faciitis? | Excruciating pain in absence of or beyond the bounds of cellulitis, crepitus, redness with blisters or bulla, and diabetic with foot cellulitis |
What is the tx for dry gangrene? For wet gangrene? | Dry: autoampuation. Wet: debridement and possible guillotine amputation |
A 66yo man w/long-standing poorly-controlled diabetes arrives at ER c/o a horrid smell coming from his L foot. Denies pain, but lost sensation years ago. Open would btwn 1st and 2nd toe on L foot +pus drainage and crepitus. Pt is tachy and febrile. Tx? | Emergent surgical debridement with possible amputation. Pt has wet gangrene. |
A 7yo boy is brought to the county clinic with a rash. The mother denies that the child has acted ill. The exam is unremarkable besides perioral honey-crusted lesions and regional lymphadenopathy. What can be used to tx this pt? | Washing area. Muprircin (topical abx) |