Infections - Bacterial

Question 1

Impetigo occurs in sites of scratching

Answer 1

True

Question 2

Bullous impetigo often occurs in the neonatal period

Answer 2

True

Question 3

If untreated, impetigo can leave scarring

Answer 3

False

Question 4

Impetigo has been linked to a risk of rheumatic fever

Answer 4

False but need to screen for strep positive PSGN

Question 5

Non bullous impetigo heals slower than bullous impetigo

Answer 5

False faster

Question 6

Bullous impetigo mimics pemphigus vulgaris on histology

Answer 6

False - foliaceus

Question 7

Impetigo of Brockhard refers to deep folliculitis

Answer 7

False superficial - 1-4mm pustules or crusted papules on an erythematous base

Question 8

Blistering distal dactylitis can be caused by staph and gp B strep usually

Answer 8

False usually Gp A strep

Question 9

Conditions caused by Gp A strep

Answer 9

IBEST
Impetigo
Blistering distal dactylitis
Ecthyma
Scarlet fever
TSS 
Perianal strep cellulitis

Question 10

Criteria for diagnosis blastomycosis like Pyoderma

Answer 10

1 - clinical presentation of verrucous plaques and multiple pustules
2 - elevated border
3 - histological pseudoepitheliomatous hyperplasia with abscesses
4 - growth of >1 pathogenic specimen from tissue Bx specimen

Question 11

Scarlet fever occurs between ages 1-4

Answer 11

False 1-10y

Question 12

80% of the population has developed anti-SPE antibodies by the age of 10

Answer 12

True

Question 13

Complications of scarlet fever

Answer 13

Otitis, 
Mastoiditis,
Sinusitis, 
Pneumonitis,
Myocarditis,
Meningitis,
Arthritis,
Hepatitis,
Acute glomerulonephritis
Rheumatic fever

Question 14

Strep toxic shock syndrome is caused by Gp A and Gp G strep

Answer 14

True

Question 15

Strep toxic shock syndrome is often due to a portal of entry caused by a disruption in skin barrier

Answer 15

True

Question 16

Severe local pain is an uncommon symptom of strep toxic shock syndrome

Answer 16

False - most common initial symptom

Question 17

Gp A strep toxic shock is associated with late onset shock and organ failure

Answer 17

False early onset

Question 18

Which cytokines are released in strep toxic shock syndrome

Answer 18

TNF-a, IL-1 and IL-6

Question 19

Complications of strep toxic shock syndrome

Answer 19

Mortality 30-60%
DIC
ARDs
Renal failure 
NEC Fas

Question 20

Very young patients but not older individuals are at risk for erysipelas

Answer 20

False both

Question 21

Erypsipelas 50% blood cultures positive

Answer 21

False 5%

Question 22

List infections with abscesses

Answer 22

Staph commonly causing folliculitis/furunculosis spectrum
Melioidosis 
Botryomycosis
Staph furunculosis 
Tuberculous gumma
Scrofuloderma

Question 23

Clostridium are spore forming gram negative rods

Answer 23

False gram positive

Question 24

Look for soft tissue crepitus with clostridium infection

Answer 24

True

Question 25

Erythrasma predisposing factors include poor hygiene

Answer 25

True

Question 26

Green black or green blue discolouration is due to PYOCYANIN , blue green pigment in p. Aeruginosa

Answer 26

True

Question 27

Otitis externa is often cussed by p. Aeruginosa

Answer 27

True

Question 28

Oculoglandular syndrome of Parinaud is caused by Bartonella henselae

Answer 28

True

Question 29

Oculoglandular syndrome of Parinaud is a unilateral conjunctivitis and ipsilateral pre auricular LN =— occurs in 5% of individuals with cat scratch disease

Answer 29

True

Question 30

Which infections have a Jarisch-Herxheimer type reaction?

Answer 30

Syphilis
Bacillary angiomatosis
Tulaeremia
Tinea capitis can