Infectious disease - basics of microbiology

Question 1

Normal skin flora

Answer 1

– Staphylococcus epidermidis (coag-negative staph)
– Staphylococcus aureus
– Streptococcus pyogenes
– Corynebacterium (aerobic diphtheroids)
– Propionibacterium acnes
– Candida species

Question 2

Normal mouth & oropharynx flora

Answer 2

– Staphylococcus epidermidis (coag-negative staph)
– Staphylococcus aureus
– Beta-hemolytic streptococci (group B strep)
– Streptococcus pneumoniae
– Streptococcus viridans
– Streptococcus mutans
– dental plaque
– Moraxella catarrhalis
– Haemophilus influenzae & parainfluenzae
– Bacteroides species

Question 3

Normal nasal flora

Answer 3

– Staphylococcus epidermidis (coag-negative staph)
– Streptococcus pneumoniae
– Streptococcus viridans
– Staphylococcus aureus
– Haemophilus influenzae & parainfluenzae
– Neisseria meningitidis (some are carriers)

Question 4

Normal GI tract flora

Answer 4

– Lactobacillus species
– Clostridium species
– Enterococci species
– Bacteroides species
– Enterobacteriaceae

Question 5

Normal urethra flora

Answer 5

– Staph. epidermidis (coag-negative staph)
– Streptococcus species
– Bacteroides species
– Fusobacterium species (F. nucleatum)
– Peptostreptococcus species

Question 6

Normal vaginal flora

Answer 6

– Lactobacillus acidophilus
– Group B b-hemolytic streptococcus (S. agalactiae)
– Bacteroides species
– Peptostreptococcus species
– Gardnerella vaginalis
– Staphylococcus epidermidis
– Enterococcus