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CIULLA; MICROBIOLOGY EXAM QUESTIONS AND 100% VERIFIED ANSWERS
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CIULLA; MICROBIOLOGY EXAM QUESTIONSAND 100% VERIFIED ANSWERS
A test for the hydrolysis of esculin in the presence of bile is especially
useful in identifying species of the genus
A. Abiotrophia
B. Corynebacterium
C. Enterococcus
D. Staphyloccus - ANSWER C. Enterococcus
And other Group D Streps
The organism associated with a disease characterized by the presence
of a pseudomembrane in the throat and the production of an exotoxin
that is absorbed into the bloodstream with a lethal affect is
A. Arcanobacterium haemolyticum
B. Staphylococcus aureus
C. Streptococcus pyogens
D. Corynebacterium diphtheriae - ANSWER D. Corynebacterium
diphtheriae
Enterotoxin produced by Staphylococcus aureus is responsible for
causing
A. Carbuncles
B. Enterocolitis
C. Impetigo
D. Scalded Skin Syndrome - ANSWER B. Enterocolitis
Abiotrophia, formerly known as nutritionally variant streptococci, will not
grow on routine blood or chocolate agars because they are deficient in
A. Hemin
B. Pyridoxal
,C. VItamin B
D. Thiophene-2-carboxylic hydrazide - ANSWER B. Pyridoxal
Exfoliatin produced by Staphylococcus aureus is responsible for causing
A. Enterocolitis
B. Toxic Shock Syndrome
C. Scalded Skin Syndrome
D. Staphylococcal pneumonia - ANSWER C. Scalded Skin Syndrome
Streptococcus pyogens can be preemptively identified using a(n)
A. PYR disk
B. ONPG disk
C. SPS disk
D. Optochin disk - ANSWER A. PYR disk
A gram positive coccus that is catalase positive, nonmotile, lysostaphin
resistant, and modified oxidase positive is best identified as a member of
the genus
A. Micrococcus
B. Lactococcus
C. Pediococcus
D. Staphylococcus - ANSWER A. Micrococcus
Nocardia asteroides infections in humans characteristically produce
A. Carbuncles
B. Draining cutaneous sinuses
C. Spetic shock
D. Serous effusions - ANSWER B. Draining cutaneous sinuses
Erysipelothrix infections in humans characteristically produce
A. Pathology at the point of entrance of the organism
B. Central nervous system pathology
C. Pathology in the lower respiratory tract
,D. The formation of abscesses in visceral organs - ANSWER A.
Pathology at the point of entrance of the organism
In the CAMP test, a single streak of a bets-hemolytic Streptococcus is
placed perpendicular to a streak of beta-lysin producing Staphylococcus
aureus. After incubation, a zone of increased lysis in the shape of an
arrowhead is notes; this indicates the presumptive identification of
A. S. agalactiae
B. S. bovis
C. S. equinus
D. S. pyogens - ANSWER A. S. agalactiae
Staphylococcus saprophyticus, a recognized pathogen, is a cause of
A. Furuncles
B. Impetigo
C. Otitis media
D. UTI - ANSWER D. UTI
The color plate 26 (Gram positive rod) shows the gram stain of a blood
culture of a 23 year old pregnant woman who presented with fever and
flu like symptoms in her ninth month. The isolate on blood agar
produced small, translucent beta-hemolytic colonies. Which of the
following is the most likely etiologic agent in this case?
A. Listeria monocytogenes
B. Propionibacterium acnes
C. Straptococcus agalactiae
D. Streptococcus pyogens - ANSWER A. Listeria monocytogenes
The etiologic agent most commonly assicated with septicemia and
meningitis of newborns is
A. Strep agalactiae
B. Strep bovis group
C. Strep pneumoniae
D. Strep pyogens - ANSWER A. Strep agalactiae
, Which of the following is the most commonly isolated species of Bacillus
in opportunistic infections such as bacteremia, post-traumatic infections
of the eye, and endocarditis?
A. B. circulans
B. B. cereus
C. B. licheniformis
D. B. subtilis - ANSWER B. B. cereus
Loeffler's serum medium is recommended for the cultivation of
A. Abiotrophia sp.
B. Corynebacterium diphtheriae
C. Leuconostoc sp.
D. Streptococcus agalactiae - ANSWER B. Corynebacterium diphtheriae
On Tinsdale agar, colonies of Corynebacterium diphtheriae are
characterized by the observance of
A. Liquification of the agar surrounding the colonies on the medium
B. Opalescent colonies in the surrounding agar
C. Black colonies on the culture medium surrounded by brown halos
D. Pitting of the agar medium surrounding the colonies - ANSWER C.
Black colonies on the culture medium surrounded by brown halos
Precipitates of diphtheria toxin and antitoxin formed in agar gels are an
in vitro means for detecting toxogenic strains of Corynebacterium
diphtheriae. The name of this test procedure is the
A. D-test
B. Elek test
C. Hodge test
D. Nagler test - ANSWER B. Elek test
The etiological agent of the disease erysipelas is
A. Staph aureus
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