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Microbiology Board Exam Prep Questions and Answers (100% Pass)
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Microbiology Board Exam Prep Questions and Answers (100% Pass)
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©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AMMicrobiology Board Exam Prep Questions and
Answers (100% Pass)
Which of the following is more likely to be diagnostic of an acute infection? - ✔️✔️A total
acute antibody titer of 2 followed by a convalescent titer of 16
Diagnosis of group A streptococci infection is indicated by the presence of: - ✔️✔️Anti-DNase
The rapid plasma reagin assay for syphilis does not need to be read microscopically because
the antigen is: - ✔️✔️Complexed with charcoal
The VDRL test for syphilis is classified as a: - ✔️✔️Flocculation reaction
One cause of a false positive VDRL test is: - ✔️✔️Systemic lupus erythematosus
Which of the following is an example of a treponemal antigen test used for the diagnosis of
syphilis? - ✔️✔️FTA-ABS
A serum sample is positive for HBsAg. This result indicates that the person from whom the
serum was taken: - ✔️✔️Has either active or chronic hepatitis B infection
Patient serum is mixed with a suspension of guinea pig antigen. When the sample is then
mixed with horse red blood cells, agglutination occurs. This is suggestive of an infection
caused by: - ✔️✔️Epstein Barr virus
The first serologic marker to appear in patients with acute hepatitis B virus infection is: -
✔️✔️HBsAg
Why does vaccination against hepatitis B virus also prevent hepatitis D virus infections? -
✔️✔️HDV requires the host to be concurrently infected with HBV
Anti-HAV: Nonreactive
Anti-HBc: Reactive
Anti-HBs: Nonreactive
HBsAg: Reactive
HBeAg: Reactive
Anti-HCV: Nonreactive - ✔️✔️Chronic HBV infection
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, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
CMV IgG titer: 20
EBV IgM titer: 80 - ✔️✔️Acute EBV infection
What is the next step after a reactive ELISA for HIV? - ✔️✔️Repeat the ELISA on the same
sample
A test for the hydrolysis of esculin in the presence of bile is especially useful in identifying
species of the genus: - ✔️✔️Enterococcus
The organism associated with a disease characterized by the presence of a psuedomembrane
in the throat and the production of exotoxin that is absorbed into the bloodstream with a
lethal effect is: - ✔️✔️Corynebacterium diphtheriae
Enterotoxin produced by Staphylococcus aureus is responsible for causing: -
✔️✔️Enterocolitis
Abiotrophia, formerly known as nutritionally variant streptococci, will not grow on routine
blood or chocolate stars because they are deficient in: - ✔️✔️Pyridoxal/Vitamin B6
Exfoliatin produced by S. aureus is responsible for causing: - ✔️✔️Scalded skin syndrome
S. pyogenes can be presumptively identified using a: - ✔️✔️PYR disk
A GPC that is catalase positive, nonmotile, lysostaphin resistant and modified oxidase
positive is best identified as a member of the genus: - ✔️✔️Micrococcus
Nocardia asteroides infections in humans characteristically produce: - ✔️✔️Draining
cutaneous sinuses
Erysipelothrix infections in humans characteristically produce: - ✔️✔️Pathology at the point of
entrance of the organism
What organism can be presumptively identified by the CAMP test? - ✔️✔️S. agalactiae
S. saprophyticus is the cause of: - ✔️✔️Urinary tract infections
GPB with translucent beta-hemolytic colonies on SPA - ✔️✔️Listeria monocytogenes
The etiologic agent most commonly associated with septicemia and meningitis of newborns
is: - ✔️✔️S. agalactiae
Which of the following is the most commonly isolated species of Bacillus in opportunistic
infections? - ✔️✔️B. cereus
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, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
Loeffler's serum medium is recommended for the cultivation of: - ✔️✔️Cornyebacterium
diphtheriae
On Tinsdale agar, colonies of C. diphtheriae are characterized by the observance of: -
✔️✔️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 toxigenic strains of C. diphtheriae. The name of this test is: - ✔️✔️Elek test
The etiologic agent of the disease erysipelas is: - ✔️✔️S. pyogenes
S. aureus when present could most likely be recovered from a stool sample if the primary
plating medium included: - ✔️✔️Phenylethyl alcohol
A common member of the normal flora of the upper respiratory tract is: - ✔️✔️Viridans
streptococcus
Streptococci obtain all their energy from the fermentation of sugars to: - ✔️✔️Lactic acid
Streptococci are unable to synthesize the enzyme: - ✔️✔️Catalase
The beta hemolysis produced by group A streptococcus seen on the surface of a sheep blood
agar plate is primarily the result of: - ✔️✔️Streptolysin S
When an infection due to streptomyces is suspected, isolates can be separated from most
other bacteria by: - ✔️✔️Incubating the culture at 25 C
The production of H2S is one characteristic used to differentiate which of the aerobic GPB? -
✔️✔️Erysipelothrix
Test tube brush motility at room temperature - ✔️✔️Listeria monocytogenes
A former species of Corynebacterium pathogenic for swine, horses and cattle which grows
pale pink colonies. - ✔️✔️Rhodococcus equi
Which of the following is not appropriate when describing S. pneumoniae? - ✔️✔️Bile
resistant
Nocardia can be differentiated from Actinomyces based on: - ✔️✔️Nocardia being catalase
positive
Enterococcus faecium is characteristically: - ✔️✔️Able to grow in the presence of high
concentrations of salt
A negative PYR test is demonstrated by: - ✔️✔️Viridans streptococci
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