ID I - Common Bacterial Pathogens by Site

Question 1

CNS/Meningitis

Answer 1

-N. meningitidis
-Strep. pneumoniae
-H. influenzae
-Group B strep, E. coli (if young)
-Listeria (if young or old)

Question 2

Upper Respiratory

Answer 2

-Strep. pneumoniae
-Strep. pyogenes
-H. influenzae
-Moraxella catarrhalis

Question 3

Lower Respiratory (Community-Acquired)

Answer 3

-Strep. pneumoniae
-H. influenzae
-Legionella (atypical)
-Mycoplasma (atypical)
-Enteric gram negative rods (if alcoholic or immunocompromised)

Question 4

Lower Respiratory (Hospital-Acquired)

Answer 4

-Strep. pneumoniae
-Staph. aureus, including MRSA
-P. aeruginosa
-Enteric gram negative rods

Question 5

Mouth

Answer 5

-Peptostreptococcus (normal flora)
-Actinomyces (normal flora)
-Anaerobic gram negative rods (Prevotella)
-Viridians group strep.

Question 6

Heart/Endocarditis

Answer 6

-Staph. aureus including MRSA
-Staph. epidermidis
-Streptococci
-Enterococci

Question 7

Skin/Soft Tissue

Answer 7

-Staph. aureus
-Staph. epidermidis
-Strep. pyogenes
-Pasteurella multocida
-Gram negative rods (if diabetic)

Question 8

Bone/Joint

Answer 8

-Staph. aureus
-Staph epidermidis
-Streptococci
-N. gonorrhoeae
-GNR

Question 9

Urinary Tract

Answer 9

-E. coli
-Proteus
-Klebsiella
-Staph. saprophyticus
-Streptococci
-Enterococci

Question 10

Enteric gram negative rods

Answer 10

-Klebsiella
-Proteus
-E. coli
-Enterobacter

Question 11

Intra-Abdominal

Answer 11

-Enteric gram negative rods
-Enterococci
-Streptococci
-Bacteroides species