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Chapter 71. Lower Respiratory Tract Infections

Which of the following statements regarding the epidemiology of community-acquired pneumonia is correct?

A. Mycoplasma pneumoniae is the most prevalent bacterial pathogen.

B. Haemophilus influenzae is a common pathogen in adults who smoke tobacco.

C. Necrotizing CAP which is common in children is caused by CA-MRSA and associated with a high (42%) mortality rate.

D. Mixed infections with bacteria and viruses are an uncommon cause of CAP in adults, incidence less than 5%.

AJ is a 52-year-old man admitted to the hospital with suspected aspiration pneumonia. His home medications are lisinopril 20 mg once daily and omeprazole 20 mg once daily. What organisms need to be considered as causative agents in AJ?

A. Staphylococcus aureus, Escherichia coli, and viridans Streptococci

B. Anaerobes, E. coli, and viridans Streptococci

C. S. aureus and anaerobes

D. Anaerobes and Streptococcus pneumoniae

E. Anaerobes, viridians Streptococci, Streptococcus pneumoniae, E. coli, and S. aureus

CD is a 66-year-old woman admitted to the hospital for respiratory failure. Upon admission she was intubated. She was improving and on day 9 was starting to be weaned off the ventilator. On day 9 her respiratory symptoms were worsening and full ventilator settings were required. She is diagnosed with ventilator-associated pneumonia. Which of the following organisms are most likely associated with her pneumonia?

A. S. pneumoniae, H. influenzae, MRSA, and MSSA

B. H. influenzae, enteric GNB, anaerobes, and MSSA

C. Pseudomonas aeruginosa, Acinetobacter spp., and MRSA

D. S. pneumoniae, H. influenzae, viridians Streptococci, and MRSA

E. P. aeruginosa, Acinetobacter spp., anaerobes, and S. pneumoniae

PF is a 50-year-old man who smokes two packs of cigarettes per day. Which of the following host defenses that protect the lung are known to be impaired by the smoke?

A. Mucous and ciliated cells

B. Alveolar macrophages

C. Immunoglobulin (IgA, IgG, and IgM)

D. A and C

E. All of the above

GH is ...

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