NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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What pathogens are seen in hospital lower respiratory infections?

  1. Staphylococcus aureus, including MRSA

  2. Streptococcus pyogenes

  3. Staphylococcus epidermidis

  4. Streptococcus pneumoniae, Haemophilus influenzae

The correct answer is: Staphylococcus aureus, including MRSA

Lower respiratory infections in hospitals can be caused by a variety of pathogens, but the most commonly seen pathogen is Staphylococcus aureus, including the aggressive form known as MRSA. While Streptococcus pyogenes and Streptococcus pneumoniae are also common causes of respiratory infections, they are not specifically associated with hospital environments. Staphylococcus epidermidis is a more common cause of infections related to implanted medical devices, rather than respiratory infections. Haemophilus influenzae is another potential cause of lower respiratory infections, but it is not as frequently seen in hospital settings as Staphylococcus aureus. Therefore, the correct answer is A.

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