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DU PA Bac Inf Skin
Duke PA Bacterial Infections of the Skin
| Question | Answer |
|---|---|
| superficial skin infections | impetigo, intertrigo |
| pyodermas | abscesses, furuncles, carbuncles |
| soft tissue infections | cellulitis, erysipelas |
| non-specific skin term (doesn't say anything about pathology) | intertrigo, folliculitis |
| superficial kind of cellulitis | erysipelas |
| bacteria causes almost all types of cellulitis | streptococcus |
| pain out of proportion to how lesion looks | necrotizing soft tissue infections (NSTI) |
| type of superficial cellulitis, almost always group A strep; sharp, raised borders | erysipelas |
| type of intertrigo caused by C. minutissium | erythrasma |
| type of NSTI caused by P. aeruginosa | ecthyma gangrenosum |
| a deep type of impetigo, is an ulcerative lesion with thick crust that is usually tender | ecthyma |
| scabbing eruption, very common in children but adults often infected, | impetigo |
| etiologic agents of impetigo | A B-hemolytic streptococcus pyogenes or S. aureus |
| predisposing factors for impetigo | truama (minor), underlying dermatoses, poor hygiene, previous antibiotic therapy, warm temps/high humidity |
| appearance of impetigo non-bullous | small pustules or vesicles that erode crust (honey-colored), surrounding skin is usually inflammed |
| appearance of impetigo bullous | vesicles or bullae containing clear or turbid fluid, surrounding skin can be normal |
| topical treatment for impetigo | bactroban (mupirocin), altabax (retapamulin)(MSSA only) |
| bacterial causes of intertrigo | groups A and B streptococci, non-diptheroid species of Corynebacterium, P. aeruginosa |
| skin on skin can cause | intertrigo |
| tend to see satellite lesions with __ caused intertrigo | candida |
| bacterial intertrigo __ bad | smells |
| patients that have an increased risk of erythrasma, it is bright red w/ woods lamp | diabetics |
| topical treatment for erythrasma | benzoyl peroxide, mupirocin, imiadazoles |
| neck-fold intertrigo in babies think __ | strep |
| dermal ulceration, crust is yellowish-gray and thicker and harder than crust in impetigo, children and elderly at risk | ecthyma |
| pyoderma etiology is almost always | S. aureus |
| localized, walled off collection of pus, can develop at any cutaneous site, starts as firm nodule that becomes fluctuant | abscess |
| deep-seated erythematous nodule, common in hair bearing regions or areas of friction, develop central necrotic plug | furuncle |
| large area of coalescing abscesses or furuncles | carbuncle |
| gold standard treatment of abscesses, furuncles, and carbuncles | incision and drainage |
| when doing an I and D be sure to remove __ or infection will recur | loculations |
| adjunctive therapy to I and D | systemic antibiotics and warm compresses |
| populations at risk for CA-MRSA | native americans, african americans, homeless, populations in close quarters, incarcerated military recruits, children in daycare, competitive athletes |
| cornerstone of CA-MRSA treatment | I and D |
| most common soft tissue infections | cellulitis, and erysipelas |
| clinical presentation of soft tissue infections | acute, diffuse inflammation of skin, +warmth and tenderness, systemic symptoms not uncommon |
| predisposing factors for soft tissue infections | trauma, surgery, mucosal infection, underlying dermatoses, immunologic deficiency |
| extends into subcutaneous tissue, borders are often indistinct, | cellulitis |
| etiologic agents of cellulitis | GAS, S. aureau |
| superficial cellulitis, raised borders with clear demarcation from uninvolved skin. | erysipelas |
| etiologic agents responsible for erysipelas | GAS, very rarely S. aureus |
| part of the body that is most commonly affected by erysipelas | lower extremity and face |
| treatment therapy for cellulitis and erysipelas | penicillinase-resistant synthetic penicillins or cephalosporins. use macrolides ( but not erythromycin) in penicillin allergic patients |
| supportive treatment for cellulitis and erysipelas | rest, elevation, warm compresses |
| peggy wants us to know about what drug for the treatment of cellulitis and erysipelas. It is very cheap and it works well | dicloxacillin |
| common sites of infection for necrotizing soft tissue infections | perineum, extremities, trunk |
| predisposing factors for folliculitis | shaving, friction in or occlusion of hair covered areas of the body, immunosuppression, topical corticosteroids |
| sites of prediliction for folliculitis | face (especially beard), scalp, neck, legs, trunk, and buttocks |
| aka barber's itch | pseudofolliculitis barbae |
| keloidal folliculitis is found in what part of the body | nape of neck at hairline |
| prevention of infectious folliculitis | antibacterial soaps |
| infection of subcutaneous lymphatic channels, usually results from trauma, red streaking from wound | acute lymphangitis |
| most common etiology of acute lymphangitis | group A streptococcis, less commonly S. aureus |
| gram negative bacteria found in marine animals that inhabit warm bodies of water | vibrio spp |
| very rare in the US, usually acquired via contact with infected animals or their products or from feed, soil contaminated with spores of the bacillus | cutaneous anthrax |
| systemic tx for erythrasma | doxycycline, macrolides |
| systemic treatment for impetigo | cephalosporins, dicloxacillin |
Created by:
bwyche
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