Which of the following disorders would be more likely associated with Staphylococcus saprophyticus rather than Staphylococcus aureus?
ABurns
BTension pneumothorax
COsteomyelitis
DAcute cystitis
It is true regarding normal microbial flora present on skin and mucous membrane that
AIt is difficult to permanently eradicate by antimicrobial agents
BIt is absent in the stomach due to acidic pH
CIt establishes in the body only after the neonatal period
DThe flora in the small bronchi is similar to that of the trachea
An 18-year-old man has facial and upper back lesions that have waxed and waned for the past 6 years. On physical examination, there are 0.3- to 0.9-cm comedones, erythematous papules, nodules, and pustules most numerous on the lower face and posterior upper trunk. Other family members have been affected by this condition at a similar age. The lesions worsen during a 5-day cruise to the Adriatic. Which of the following organisms is most likely to play a key role in the pathogenesis of these lesions?
APropionibacterium acnes
BHerpes simplex virus type 1
CGroup A β-hemolytic streptococcus
DMycobacterium leprae
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