question
Which of the following organisms best describes a catalase-negative, gram-positive coccus that is b-hemolytic on sheep blood agar, and bacitracin positive?
1 Streptococcus pyogenes
2 Streptococcus pneumoniae
3 Staphylococcus epidermidis
4 Micrococcaceae spp.
1 Streptococcus pyogenes
2 Streptococcus pneumoniae
3 Staphylococcus epidermidis
4 Micrococcaceae spp.
answer
1
question
Which species of bacteria is responsible for causing diseases such as rheumatic fever, glomerulonephritis, and exudative pharyngitis?
1 Streptococcus agalactiae
2 S. pyogenes
3 S. pneumoniae
4 Enterococcus
1 Streptococcus agalactiae
2 S. pyogenes
3 S. pneumoniae
4 Enterococcus
answer
2
question
S. pneumoniae can be described as:
1 resistant to bile and optochin.
2 b-hemolytic on sheep blood agar
3 CAMP positive
4 often carrying an antiphagocytic capsule.
1 resistant to bile and optochin.
2 b-hemolytic on sheep blood agar
3 CAMP positive
4 often carrying an antiphagocytic capsule.
answer
4
question
The colonial morphologic features of this organism resemble a donut as it ages, and it has a polysaccharide capsule that is responsible for its virulence. What two characteristics describe this organism?
1 b-hemolytic and susceptible to optochin
2 a-hemolytic and bile solubility-negative
3 g-hemolytic and resistant to optochin
4 a-hemolytic and bile solubility-positive
Based on the morphologic features listed, the organism is S. pneumoniae
1 b-hemolytic and susceptible to optochin
2 a-hemolytic and bile solubility-negative
3 g-hemolytic and resistant to optochin
4 a-hemolytic and bile solubility-positive
Based on the morphologic features listed, the organism is S. pneumoniae
answer
4
question
The development of acute rheumatic fever and subsequent valvular heart disease are problems that may be encountered by patients infected with:
1 Enterococcus faecalis.
2 S. pneumoniae.
3 S. pyogenes.
4 S. agalactiae.
1 Enterococcus faecalis.
2 S. pneumoniae.
3 S. pyogenes.
4 S. agalactiae.
answer
3
question
The development of glomerulonephritis is a problem that may be encountered by patients infected with:
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
answer
3
question
Erythrogenic toxin, hyaluronidase enzyme, and hemolysins S and O are extracellular products of:
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
answer
3
question
The bacterial species that can be described as able to hydrolyze hippurate, is b-hemolytic, is a major cause of neonatal meningitis and sepsis, and is a producer of the Christie, Atkins, Munch-Petersen (CAMP) factor is:
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
answer
4
question
When performing the CAMP test, what bacteria is steaked down the middle?
S. epidermidis
Staphylococcus aureus
S. pyogenes
E. faecalis
S. epidermidis
Staphylococcus aureus
S. pyogenes
E. faecalis
answer
2
question
The major etiologic agent of bacterial endocarditis in the United States is:
E. faecalis.
S. pneumoniae.
S. pyogenes.
Viridans streptococci.
E. faecalis.
S. pneumoniae.
S. pyogenes.
Viridans streptococci.
answer
4
question
Enterococci can be described as:
able to hydrolyze bile esculin.
usually b-hemolytic.
a major cause of pharyngitis.
often carrying an antiphagocytic capsule.
able to hydrolyze bile esculin.
usually b-hemolytic.
a major cause of pharyngitis.
often carrying an antiphagocytic capsule.
answer
1
question
The bacterial species that can be described as able to grow in 6.5% sodium chloride (NaCl) and 40% bile, is part of the normal fecal flora of animals and humans, displays g hemolysis, and is a major cause of nosocomial infections is:
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
E. faecalis.
S. pneumoniae.
S. pyogenes.
S. agalactiae.
answer
1
question
Generally speaking, nutritionally variant streptococci require what ingredient not found in most conventional media?
Vitamin B6
Nalidixic acid and its components
Nicotinamide adenine dinucleotide (NAD) enrichment
Blood or blood products
Vitamin B6
Nalidixic acid and its components
Nicotinamide adenine dinucleotide (NAD) enrichment
Blood or blood products
answer
1
question
What morphologic feature is a major consideration in determining an identification scheme for streptococci?
Colony shape and color
Hemolytic pattern
Smell
Consistency
Colony shape and color
Hemolytic pattern
Smell
Consistency
answer
2
question
What name is given to the type of hemolysis that produces incomplete hemolysis and a greening discoloration of the medium?
b hemolysis
g hemolysis
a hemolysis
k hemolysis
b hemolysis
g hemolysis
a hemolysis
k hemolysis
answer
3
question
What name is given to the type of hemolysis that produces complete hemolysis and a clearing of the medium?
b hemolysis
g hemolysis
a hemolysis
k hemolysis
b hemolysis
g hemolysis
a hemolysis
k hemolysis
answer
1
question
Differentiation of the pleomorphic strains of streptococci and the similar corynebacteria or lactobacilli can be best accomplished by:
examination of Gram stain of the colony.
vancomycin-susceptibility testing.
serologic testing.
examination of the morphologic features after growth in thioglycollate broth.
examination of Gram stain of the colony.
vancomycin-susceptibility testing.
serologic testing.
examination of the morphologic features after growth in thioglycollate broth.
answer
4
question
Bacitracin, CAMP factor, PYR, and hippurate are tests most likely performed on a(n) _______ Streptococcus.
aalpha-hemolytic
bbeta-hemolytic
ggamma-hemolytic
non-hemolytic
aalpha-hemolytic
bbeta-hemolytic
ggamma-hemolytic
non-hemolytic
answer
2
question
Optochin, PYR, bile solubility, esculin, and 6.5% NaCl are tests most likely performed on a(n) _______ Streptococcus.
aalpha-hemolytic
bbeta-hemolytic
ggamma-hemolytic
non-hemolytic
aalpha-hemolytic
bbeta-hemolytic
ggamma-hemolytic
non-hemolytic
answer
1
question
The drugs of choice for most Enterococcal infections are:
vancomycin and a penicillin.
clindamycin and vancomycin.
penicillin and an aminoglycoside.
septra.
vancomycin and a penicillin.
clindamycin and vancomycin.
penicillin and an aminoglycoside.
septra.
answer
3
question
Sheep Blood agar is "stabbed" when inoculating bacteria to enhance hemolysis caused by:
streptolysin O.
streptolysin S.
streptokinase.
hyaluronidase.
SBA should be stabbed to force some of the organism to grow in a reduced oxygen content which allows for the detection of streptolysin ?, an oxygen labile virulent factors produced by S. pyogenes
streptolysin O.
streptolysin S.
streptokinase.
hyaluronidase.
SBA should be stabbed to force some of the organism to grow in a reduced oxygen content which allows for the detection of streptolysin ?, an oxygen labile virulent factors produced by S. pyogenes
answer
1
question
Select all the bacteria that are alpha hemolytic.
Strep pneumoniae
Strep pyogenes
Strep agalactiae
Viridens Strep
Strep pneumoniae
Strep pyogenes
Strep agalactiae
Viridens Strep
answer
1 4
question
Select all the bacteria that are beta hemolytic.
Strep pneumoniae
Strep pyogenes
Strep agalactiae
Viridens Strep
Strep pneumoniae
Strep pyogenes
Strep agalactiae
Viridens Strep
answer
2 3
question
Which of these are CAMP positive?
The streaks with the arrows
The streaks without the arrows
The streaks with the arrows
The streaks without the arrows
answer
1
question
Identify the bacteria with the following results:
GPC, Catalase(+), Coagulase(+)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase(+), Coagulase(+)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Staph aureus
question
Identify the bacteria with the following results:
GPC, Catalase (-), Nonhemolytic, Bile esculin (+), PYR/6.5%NaCl (+)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase (-), Nonhemolytic, Bile esculin (+), PYR/6.5%NaCl (+)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Enterococcus
question
Identify the bacteria with the following results:
GPC, Catalase(+), Coagulase(-),Novobiocin(S)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase(+), Coagulase(-),Novobiocin(S)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Staph epidermidis
question
Identify the bacteria with the following results:
GPC, Catalase (-), Alpha hemolytic, Optichin (R), Bile esculin (+), PYR/6.5%NaCl (-)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase (-), Alpha hemolytic, Optichin (R), Bile esculin (+), PYR/6.5%NaCl (-)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Group D Strep
question
Identify the bacteria with the following results:
GPC, Catalase(+), Coagulase(-),Novobiocin(R) -- Staphylococcus saprophyticus
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase(+), Coagulase(-),Novobiocin(R) -- Staphylococcus saprophyticus
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Staph saprophyticus
question
Identify the bacteria with the following results:
GPC, Catalase (-), Alpha hemolytic, Optichin (R), Bile esculin (-)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase (-), Alpha hemolytic, Optichin (R), Bile esculin (-)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Viridens Strep
question
Identify the bacteria with the following results:
GPC, Catalase(-), Beta hemolytic, Bacitracin/PYR (R/-), Hippurate Hydrolysis/CAMP/PYR (+)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase(-), Beta hemolytic, Bacitracin/PYR (R/-), Hippurate Hydrolysis/CAMP/PYR (+)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Strep agalactiae
question
Identify the bacteria with the following results:
GPC, Catalase(-), Alpha hemolytic, Optichin (S)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase(-), Alpha hemolytic, Optichin (S)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Strep pneumoniae
question
Identify the bacteria with the following results:
GPC, Catalase(-), Beta hemolytic, Bacitracin (S)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
GPC, Catalase(-), Beta hemolytic, Bacitracin (S)
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus epidermidis
Micrococcus
Streptococcus pyogenes
Streptococcus agalactiae
Beta Hemolytic Strep (not A, B or D)
Enterococcus
Group D Strep
Streptococcus pneumonia
Viridens Strep
answer
Strep pyogenes