Common pathogens

Question 1

CNS/Meningitls

Answer 1

Streptococcus pneumoniae
Neisseria meningitidis
Haemophilus influenzae
G ro up B Streptococcus/E. coll (young)
Listeria (yo ung/old)

Question 2

Mouth

Answer 2

M o u th flora (Peptostreptococcus)
A naerobic GNR (Prevotella, others)
V iridans group Streptococci

Question 3

Upper Respiratory

Answer 3

Streptococcus pyogenes
Streptococcus pneumoniae
Haemophilus influenzae
Moraxella catarrhaiis

Question 4

Lower Respiratory (Community)

Answer 4

Streptococcus pneumoniae
Haemophilus influenzae
Atypicals: Legionella, Mycoplasma,
Chlamydophilia
Enteric GNR (alcoholics)

Question 5

Lower Respiratory (Hospital)

Answer 5

Staphylococcus aureus, including MRSA
Pseudomonas aeruginosa
Acinetobacter baumannii
Enteric GNR (including ESBL, MDR)
Streptococcus pneumoniae

Question 6

Heart/Endocarditis

Answer 6

Staphylococcus aureus, including MRSA
Staphylococcus epidermidis
Streptococci
Enterococci

Question 7

Intra-abdominal

Answer 7

Enteric GNR
Enterococci
Streptococci
Bacteroides Sp.

Question 8

Skin/Soft Tissue

Answer 8

Staphylococcus aureus
Streptococcus pyogenes
Staphylococcus epidermidis
Pasteurella multocida
± aerobic /a nae rob ic GNR
(in diabetes)

Question 9

Bone/Joint

Answer 9

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

Question 10

Urinary Tract

Answer 10

E. Coli
Proteus
Klebsiella
Staphylococcus saprophyticus
enterococci