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Microbiology Test

Enter the letter for the matching Answer
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1.
Which is the MOST frequent cause of prosthetic heart valve infections occurring within 2-3 months after surgery is:
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2.
It is important to differentiate between Enterococcus and group D strep because:
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3.
An isolate of unknown beta-hemolytic Strep is streaked perpendicular to a streak of beta-lysin producing S. aureus. Zone of arrowhead hemolysis is noted. What is the name of the test and presumptive ID of unknown strep?
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4.
A beta-hemolytic gram-pos coccus was isolated from CSF of a 2 day old infant w/signs of meningitis. This isolate grew on sheep blood agar under aerobic conditions and was resistant to a bacitracin disc. What should be performed for the identification?
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5.
"Nutritionally deficient" streptococci are:
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6.
Which of the 2 different antimicrobial agents are commonly used and may results in synergistic action in the treatment of endocarditis caused by Enterococcus faecalis?
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7.
A gamma-hemolytic Streptococcus that blackens bile esculin agar but does not grow in 6.5% NaCl broth is MOST likely:
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8.
An outbreak of Staphylococcus aureus has occurred in a hospital nursery. In order to establish the epidemiological source of the outbreak, the MOST commonly used typing method is:
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9.
Gram stain examination from a blog culture bottle shows dark blue, spherical organisms in clusters. Growth on sheep blood agar shows small, round, pale yellow colonies. Further tests should include:
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10.
A beta-hemolytic, catalase positive, gram-positive coccus is coagulase negative by the slide coagulase test. Which is the MOST appropriate action in identification of this organism?
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11.
Children who have infections with beta-hemolytic streptococci can develop:
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12.
A light yellow colony from a skin lesion grew aerobically and was catalase positive and coag neg. Gram stained as positive cocci in clusters, modified oxidase positive, bacitracin susceptible and resistant to lysostaphin. The identification is?
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13.
A beta-hemolytic streptococci that is bacitracin-sensitive and CAMP-negative is:
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14.
Group B, beta-hemolytic streptococci may be distinguished from other hemolytic streptococci by which procedure?
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15.
Gram-positive cocci in chains are seen on a Gram stain from a blood culture. The organism grows as a beta-hemolytic colony. Further tests that could be performed include:
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16.
The enterotoxin produced by certain strains of hemolytic, coagulase positive Staphylococcus aureus:
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17.
The Gram stain from a blood culture shows gram-pos cocci in chains. No growth occurs on blood agar plates incubated aerobically and anaerobically. Additional testing should be done to detect the presence of:
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18.
In the optochin susceptibility test, if there is a zone of inhibition of 19-30mm surrounding the disk following overnight incubation at 37C, the colony MOST likely consist of:
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19.
An important cause of acute exudative pharyngitis is:
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20.
The MOST critical distinction between Staphylococcus aureus and other Staphylococcus is:
A.
acute glomerulonephritis
B.
coagulase production
C.
bile esculin, PYR, bacitracin, and hippurate
D.
a penicillin derivative and an aminoglycoside
E.
enterococci often show more antibiotic resistance than group D streptococci
F.
group A
G.
do a tube coagulase test to confirm the slide test
H.
in the genera Granulicatella and Abiotrophia
I.
causes one type of bacterial food poisoning
J.
Micrococcus luteus
K.
pneumococci
L.
Streptococcus pyogenes
M.
pulsed-field ges electrophoresis
N.
Staphylococcus epidermidis
O.
CAMP test and S. agalactiae
P.
group D Streptococcus
Q.
catalase production and coagulase test
R.
latex antigen typing
S.
Abiotrophia defectiva
T.
latex antigen testing
Type the Answer that corresponds to the displayed Question.
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21.
Which organisms is, to date, considered universally susceptible to penicillin:
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22.
A beta-hemolytic Streptococcus that is bacitracin-resistant and CAMP-positive is"
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23.
The optochin (ethylhydrocupreine hydrochloride) disk is used for the identification of:
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24.
A urine Gram stain shows gram-positive cocci in clusters. The organisms tested catalase positive. To SPECIATE this organism form culture, the tech should perform a coagulase test and a/an:
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25.
A gram-pos coccus isolated from a blood culture has the following characteristics: optochin suscept-neg, bacitracin suscept-neg, bile esculin hydrolysis-neg, hippurate hydrolysis-pos, catalase-neg. The organism is MOST likely:
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26.
A reliable test for distinguishing Staphylococcus aureus from other staphylococcus is:
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27.
Viridans streptococci can be differentiated from Streptococcus pneumoniae by:
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28.
Which organism may be used as a positive quality control organism for the bile esculin test?
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29.
The organism MOST commonly associated with neonatal purulent meningitis is:
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30.
How many hours after eating contaminated food do initial symptoms of staphylococcal food poisoning typically occur?

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