Infectious diseases - Chest infections

Question 1

Common causes of pneumonia

Answer 1

Streptococcus pneumoniae (50%)

Haemophilus influenzae (20%)

Question 2

Other important causes of pneumonia in specific groups

Answer 2

Moraxella catarrhalis in immunocompromised or COPD

Pseudomonas aeruginosa - CF or bronchiectasis

Staph aureus - CF

Question 3

Atypical bacterial causes of pneumonia

Answer 3

Legions of psittaci MCQs mnemonic

Legionella pneumophila
Chlamydia psittaci
Mycoplasma pneumoniae
Chlamydydophila pneumoniae
Q fever (coxiella burnetii)

Question 4

First line antibiotic choice for pneumonia

Answer 4

Amoxicillin

Alternatives:

• Erythromycin/clarithromycin
• Doxycycline

Question 5

Treatment of atypical bacterial pneumonia

Answer 5

Macrolides such as clarithromycin

Quinolones such as levofloxacin

Tetracyclines such as doxycycline