Common Bacterial Pathogens

Question 1

Meningitis

Answer 1

1. Streptococcus pneumoniae
2. Neisseria meningitidis
3. Haemophilus influenzae

Question 2

Brain Abscesses

Answer 2

1. Streptococcus (S. intermedius spp.)
2. Bacteroides and Prevotella spp.
3. Enteric gram negative bacilli
4. Staphylococcus aureus

Question 3

Otitis Media

Answer 3

1. Streptococcus pneum oniae 2. Haemophilus influenzae

3. Moraxella catarrhalis

Question 4

Sinusitis

Answer 4

1. Streptococcus pneumoniae
2. Haemophilus influenzae (unencapsulated) 3. Anaerobes
   Children: S. pneumoniae, H. influenzae, Moraxella catarrhalis

Question 5

Endocarditis

Answer 5

1. Strep viridans
2. Enterococcus
3. Staph aureus

Question 6

Pyelonephritis

Answer 6

1. Escherichia coli
2. Other Enterobacteriaceae
3. Enterococcus spp.

Question 7

Prostatitis

Answer 7

1. Enterobacteriaceae

2. Pseudomonas spp.

Question 8

Pneumonia

Community Acquired

Answer 8

1. Streptococcus pneumoniae 2. Mycoplasma pneumoniae 3. Haemophilus influenzae
2. Chlamydia pneumoniae

Question 9

Pneumonia

Nosocomial

Answer 9

1. Klebsiella pneumoniae
2. Staphylococcus aureus
3. Pseudomonas aeruginosa 4. Enterobacter spp.

Question 10

Sepsis/Bacteremia

Answer 10

1. Staphylococcus spp.
2. Streptococcus spp.
3. Escherichia coli
4. Enterobacter spp.
5. Pseudomonas aeruginosa

Question 11

Cystitis

Answer 11

1. Escherichia coli
2. Staphylococcus saprophyticus (women)
3. Proteus spp.

Question 12

Osteomyelitis/Cellulitis

Answer 12

1. Staphylococcus aureus
2. Streptococcus spp.
3. Haemophilus influenzae (children)
   Diabetics- same as above plus:
4. Enterobacteriaceae
5. Anaerobes