Common Bacterial Infections

Question 1

Infection: Community-Acquired Pneumonia (CAP)

Answer 1

Causative Organism: Streptococcus pneumoniae
First-line Treatment: Amoxicillin
Second-line Treatment: Doxycycline or clarithromycin

Question 2

Infection: Urinary Tract Infection (UTI) - uncomplicated in women

Answer 2

Causative Organism: Escherichia coli
First-line Treatment: Nitrofurantoin
Second-line Treatment: Trimethoprim or fosfomy

Question 3

Infection: Cellulitis

Answer 3

Causative Organism: Streptococcus pyogenes, Staphylococcus aureus
First-line Treatment: Flucloxacillin
Second-line Treatment: Clarithromycin (if penicillin allergy)

Question 4

Infection: Bacterial Meningitis (adult)

Answer 4

Causative Organism: Neisseria meningitidis, Streptococcus pneumoniae
First-line Treatment: IV cefotaxime or ceftriaxone
Second-line Treatment: IV chloramphenicol (if beta-lactam allergy)

Question 5

Infection: Clostridioides difficile (C. dif

Answer 5

Causative Organism: Clostridioides difficile
First-line Treatment: Oral vancomycin
Second-line Treatment: Fidaxomicin

Question 6

Infection: Impetigo

Answer 6

Causative Organism: Staphylococcus aureus, Streptococcus pyogenes

First-line Treatment: Topical fusidic acid
Second-line Treatment: Oral flucloxacillin

Question 7

Infection: Otitis media (acute)

Answer 7

Causative Organism: Streptococcus pneumoniae, Haemophilus influenzae
First-line Treatment: Amoxicillin
Second-line Treatment: Erythromycin or clarithromycin

Question 8

Infection: Gonorrhoea

Answer 8

Causative Organism: Neisseria gonorrhoeae
First-line Treatment: IM ceftriaxone
Second-line Treatment: (Check local guidelines due to resistance