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30 Cards in this Set
- Front
- Back
What are the SIX red rashes of childhood (acute, febrile |
Measles
Rubella Scarlet fever (GAS) Chicken pox (VZV) Parvovirus B19 HHV-6 |
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Cause of single or multiple scaly and/or crusted patches and/or plaques, affecting the scalp or beard area +/- inflammation.
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Dermatophytes
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KOH prep of scales from the scalp and plucked hairs from cutaneous mycoses may reveal?
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hyphae and spores
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Most common cause of cutaneous mycoses
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Trichophyton spp.
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Common cause of cutaneous mycosis with animal contact
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Microsporum spp.
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Oral DOC of cutaneous mycoses
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itraconazole
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Topical DOC of cutaneous mycoses
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terbinafine
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Dz w/ subcutaenous lesions w/ slow spread by lymphatic system producing nodules in a gardener, or from rose-thorn injury.
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Sporotrichosis
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Cause of subcutaenous lesions w/ slow spread by lymphatic system producing nodules in a gardener, or from rose-thorn injury.
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Sporothrix schenckii
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Dimorphic fungus that grows at 37°C as cigar-shaped yeast, and produces septate hyphae and conidia (in daisy arrangement) at
25°C is |
Sporothrix schenckii
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DOC of sporotrchosis
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itraconazole.
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Cause of deeper and wider lesions with interconnecting subcutaneous abscesses arising from infection of several neighboring hair follicles, in young children.
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Staphylococcus aureus (Curbuncle)
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Cause of single or multiple, isolated or coalescent, small,
superficial pustules progressing to erosions covered by stuck-on, honey-colored crusts, surrounded by erythematous halo, in young children. |
Staphylococcus aureus >>
Streptococcus pyogenes (non- bullous impetigo) |
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mecA (SCC) genes which encode PBP2a, w/ low affinity for
$-lactams; confers resistance in Staphylococcus aureus against what? |
Nafcillin
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Dz characterized by bullae and denuded areas after the
blisters rupture, covered by thin, varnish-like light brown crusts; regional lymphadenopathy, in children. DOC if lab: gram stain and culture of pus or base of the lesions yields GPC in chains. DOC if lab: gram stain and culture of pus or base of the lesions yields GPC in clusters. |
Bullous impetigo
Penicillin G Nafcillin |
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Cause of spreading (butterfly-wing) erythema on the face that responds to empirical penicillin.
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Streptococcus pyogenes (Erysipelas)
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Cause of severe pain on his knee w/ site of injury is tender and erythematous. Blood culture may yield?
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Streptococcus pyogenes. (Cellulitis)
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What is the microbial factor that promotes degradation of C3b by binding to factor H, the serum $ globulin factor
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M protein
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Other causes of cellulitis:
Clue1: cat/dog bite. What? Clue2: Salt water exposure. What? Clue3: Fresh water exposure. What? Clue4: Neutropenia. What? Clue5: Human bite. What? |
Pasteurella multocida/Capnocytophaga canimorous
Vibrio vulnificus Aeromonas hydrophila Pseudomonas aeruginosa Eikenella corrodens |
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Most common cause of Dz characterized by fever/chills/
night sweats, localizing pain/tenderness or swelling/erythema; elevated ESR, CRP; elevated WBC and platelets. Radiology: periosteal elevation. |
Staphylococcus aureus (Osteomyelitis)
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Major antiphagocytic virulence factor of drug-resistant organism that causes osteomyelitis is
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protein A
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Major neutrophil-damaging virulence factor of drug-resistant organism that causes osteomyelitis is
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Penton-Valentine leukocydin
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Cause of vertebral, sternoclavicular or pelvic bone infections (in pt w/ IVDU) or osteochondritis of foot (following penetrating injuries through tennis shoes)?
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Pseudomonas aeruginosa
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Cause of osteomyelitis in pt w/ underlying sickle cell Dz; blood culture +)?
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Salmonella typhimurium
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Cause of chronic, vertebral osteomyelitis (blood culture
negative)? |
Mycobacterium tuberculosis
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Cause of osteomyelitis in pt. w/ hx of cat bites; GNSR; fastidious growth of wound culture?
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Pasteurella multocida
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Dz is characterized by fever, chills, malaise, joint pain, swelling. PE: tenderness, erythema, heat, swelling, decreased ROM. CBC: leukocytosis w/ neutrophils predominating; joint
aspirate: no crystals; yields bacteria. TOW? Caused by? Clue1: sexually active; blood culture negative; responds to ceftriaxone) Think of other pathogen associations (blood culture negative): Clue2: Rheumatoid arthritis? Clue3: IVDU? Clue4: Unpasteurized dairy products Clue5: Diabetes-Grp B strep. |
Septic arthritis
Neisseria gonorrhoeae S. aureus S. aureus, P. aeruginosa Brucella spp. GBS |
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Dz is characterized by arthritis in up to 6 joints (especially knees, feet), low back pain/stiffness, irritable eyes w/ or w/o redness, conjunctivitis, iritis, malaise. TOW?
Caused by: Clue1: sexually acquired Clue2: non-sexually acquired |
Reactive arthritis
C. trachomatis, N. gonorrhoeae Campylobacter, Salmonella |
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Cause of bacteremia in neutopenic pts with central line or
pts with prosthetic devices and catheters; blood culture (+) coagulase-negative bacteria. |
Staphylococcus epidermidis
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Cause of intraabdominal abscess w/ putrid pus; anaerobic bacteremia in pt with trauma or solid GI tumor?
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Bacteroides fragilis.
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