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30 Cards in this Set

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What are the SIX red rashes of childhood (acute, febrile
exanthema illnesses)?

(Clue1: maculopapular rash; off-white lesions on buccal mucosa,
vaccine preventable virus)

(Clue2: maculopapular rash; vaccine preventable virus)

(Clue3: scarlatina rash post pharyngitis)

(Clue4: vesicular rash, moderate pain)

(Clue5: maculopapular “slapped face” appearance)

(Clue6: maculopapular rash and generalized sx/sn in an
immunocompromised pt)

Measles

Rubella

Scarlet fever (GAS)

Chicken pox (VZV)

Parvovirus B19

HHV-6
Cause of single or multiple scaly and/or crusted patches and/or plaques, affecting the scalp or beard area +/- inflammation.
Dermatophytes
KOH prep of scales from the scalp and plucked hairs from cutaneous mycoses may reveal?
hyphae and spores
Most common cause of cutaneous mycoses
Trichophyton spp.
Common cause of cutaneous mycosis with animal contact
Microsporum spp.
Oral DOC of cutaneous mycoses
itraconazole
Topical DOC of cutaneous mycoses
terbinafine
Dz w/ subcutaenous lesions w/ slow spread by lymphatic system producing nodules in a gardener, or from rose-thorn injury.
Sporotrichosis
Cause of subcutaenous lesions w/ slow spread by lymphatic system producing nodules in a gardener, or from rose-thorn injury.
Sporothrix schenckii
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
DOC of sporotrchosis
itraconazole.
Cause of deeper and wider lesions with interconnecting subcutaneous abscesses arising from infection of several neighboring hair follicles, in young children.
Staphylococcus aureus (Curbuncle)
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)
mecA (SCC) genes which encode PBP2a, w/ low affinity for
$-lactams; confers resistance in Staphylococcus aureus against
what?
Nafcillin
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
Cause of spreading (butterfly-wing) erythema on the face that responds to empirical penicillin.
Streptococcus pyogenes (Erysipelas)
Cause of severe pain on his knee w/ site of injury is tender and erythematous. Blood culture may yield?
Streptococcus pyogenes. (Cellulitis)
What is the microbial factor that promotes degradation of C3b by binding to factor H, the serum $ globulin factor
M protein
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
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)
Major antiphagocytic virulence factor of drug-resistant organism that causes osteomyelitis is
protein A
Major neutrophil-damaging virulence factor of drug-resistant organism that causes osteomyelitis is
Penton-Valentine leukocydin
Cause of vertebral, sternoclavicular or pelvic bone infections (in pt w/ IVDU) or osteochondritis of foot (following penetrating injuries through tennis shoes)?
Pseudomonas aeruginosa
Cause of osteomyelitis in pt w/ underlying sickle cell Dz; blood culture +)?
Salmonella typhimurium
Cause of chronic, vertebral osteomyelitis (blood culture
negative)?
Mycobacterium tuberculosis
Cause of osteomyelitis in pt. w/ hx of cat bites; GNSR; fastidious growth of wound culture?
Pasteurella multocida
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
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
Cause of bacteremia in neutopenic pts with central line or
pts with prosthetic devices and catheters; blood culture (+)
coagulase-negative bacteria.
Staphylococcus epidermidis
Cause of intraabdominal abscess w/ putrid pus; anaerobic bacteremia in pt with trauma or solid GI tumor?
Bacteroides fragilis.