ID: common bacterial pathogens for select sites of infection

Question 1

CNS/meningitis

Answer 1

Strep pneumonia
Neisseria meningitidis
Haemophilus influenza
Group B Streptococcus/ E. Coli (young)
Listeria (young/old)

Question 2

Mouth

Answer 2

mouth flora (Peptostreptococcus)
anaerobic GNR (prevotella, others)
Viridans group Streptococci

Question 3

Upper Respiratory

Answer 3

Strep pyogenes
Strep pneumonia
H. influenza
Moraxella catarrhalis

Question 4

Lower Respiratory (community)

Answer 4

S. pneumonia
H. influenza

Atypicals: legionella, mycoplasma, chlamydophilia

enteric GNR (alcoholics)

Question 5

Lower Respiratory (hospital)

Answer 5

Staph aureus (including MRSA)
Pseudomonas aeruginosa
Acinetobacter Baumannii
Enteric GNR (including ESBL, MDR)
Strep pneumonia

Question 6

Heart/endocarditis

Answer 6

Staph aureus (including MRSA)
Staph epidermidis
Streptococci
Enterococci

Question 7

Skin/Soft tissue

Answer 7

Staph Aureus
Strep pyogenes
Staph epidermidis
Pasteurella multocida

+/- aerobic/anaerobic GNR (in diabetes)

Question 8

Urinary Tract

Answer 8

E. Coli
Proteus
Klebsiella
Steph saprophyticus
Enterococci

Question 9

Bone/Joint

Answer 9

Staph aureus
Staph epidermidis
Streptococci
Neisseria gonorrhoeae
GNR (only in specific situations)

Question 10

Intra-abdominal

Answer 10

Enteric GNR

Enterococci/Streptocci Bacterioides species