Question 1

The two important hemolysins of Group A streptococci are _____ and _____.

Accepted Answer

streptolys...

Question 2

A patient has a suspicious skin infection and a culture is taken.Which media would be appropriate to select for staphylococci?

Accepted Answer

A)  Nutrient agar
B)  Blood agar
C)  Chocolate agar
D)  MacConkey agar
E)  Mannitol salt agarF) A) and D)
G) C) and D)

Question 3

Streptokinase causes the symptoms of scarlet fever.

Accepted Answer

A) True 
 B)False

Question 4

Sue brought her daughter Amy to the pediatrician complaining of a sore throat.The physician examines Amy and observes that her throat is bright red and there are white pus-filled nodules on her tonsils.Which of the following conclusions should be made?

Accepted Answer

A)  She has a strep throat and should begin antibiotics.
B)  She should have a rapid strep test performed before a diagnosis is made.
C)  She should go home and rest because most sore throats are viral in origin.
D)  She should go home and come back in two days for a strep test since it may take that long to show up.
E)  She has a staphylococcal sore throat and should begin antibiotics immediately.F) B) and D)
G) A) and D)

Question 5

The M protein of Streptococcus pyogenes:

Accepted Answer

A)  is the basis for the organism belonging to Lancefield group A.
B)  gives rise to a zone of b hemolysis on blood agar.
C)  protects against phagocytosis and enhances adherence.
D)  is also called streptokinase.
E)  protects against lysozyme damage.F) A) and B)
G) A) and E)

Question 6

Which is incorrect about Staphylococcus aureus food intoxication?

Accepted Answer

A)  Food becomes contaminated by a human carrier.
B)  Common associated foods include custards, ham, cream pastries, processed meats.
C)  After contamination, food must be left unrefrigerated for a few hours.
D)  Ingestion of the pathogen allows it to multiply and damage the GI tract lining.
E)  Symptoms come on quickly, and include nausea, vomiting, diarrhea.F) A) and E)
G) All of the above

Question 7

Staphylococcus, Streptococcus, and Neisseria tend to stimulate pus production and are collectively referred to as _____ cocci.

Accepted Answer

The answer of Staphylococcus, Streptococcus, and Neisseria tend to stimulate...

Question 8

Streptococcal pharyngitis involves all the following, except:

Accepted Answer

A)  a purulent exudate over the tonsils.
B)  can lead to scarlet fever if it is an erythrogenic toxin-producing strain.
C)  can lead to serious sequelae.
D)  is usually caused by the viridans streptococci.
E)  causes redness, difficulty in swallowing, and fever.F) A) and B)
G) B) and D)

Question 9

Which pathogen has drug resistant strains called MRSA?

Accepted Answer

A)  Staphylococcus aureus
B)  Staphylococcus epidermidis
C)  Staphylococcus saprophyticus
D)  Streptococcus pyogenes
E)  Streptococcus agalactiaeF) C) and D)
G) B) and E)

Question 10

Discuss how normal flora Staphylococcus epidermidis can cause disease in the body, and describe the diseases that it causes.

Accepted Answer

Staphylococcus epidermidis is a type of ...

Question 11

Which of the following antibiotics specifically disrupt protein synthesis of streptococci?

Accepted Answer

A)  Beta-lactams
B)  Macrolides
C)  Cephalosporins
D)  Ansamycin
E)  AminoglycosidesF) A) and B)
G) None of the above

Question 12

Neisseria meningitidis and Neisseria gonorrhoeae are fastidious, gram-negative cocci that produce oxidase.

Accepted Answer

A) True 
 B)False

Question 13

The viridans streptococci are:

Accepted Answer

A)  not entirely groupable by Lancefield serology.
B)  the most numerous residents of the oral cavity.
C)  opportunists that can cause subacute endocarditis.
D)  introduced to deeper body tissues by dental or surgical procedures.
E)  All of the choices are correct.F) A) and E)
G) A) and D)

Question 14

Neisseria gonorrhoeae is:

Accepted Answer

A)  the cause of ophthalmia neonatorum.
B)  the cause of gonorrhea.
C)  called the gonococcus.
D)  virulent due to fimbriae and a protease that inactivates IgA.
E)  All of the choices are correct.F) A) and C)
G) B) and D)

Question 15

Pneumovax is a vaccine for prevention of disease caused by strains of Neisseria meningitidis.

Accepted Answer

A) True 
 B)False

Question 16

Streptococcus agalactiae is known as Group _____ streptococci.B

Accepted Answer

The answer of Streptococcus agalactiae is known as Group _____...

Question 17

Symptoms of Toxic Shock Syndrome include all the following, except:

Accepted Answer

A)  fever and muscle pain.
B)  appearance of flesh being "eaten" down to the muscle.
C)  nausea, vomiting, diarrhea.
D)  sunburn-like rash.
E)  kidney and liver failure.F) A) and B)
G) A) and C)

Question 18

Streptococcus pyogenes causes all the following, except:

Accepted Answer

A)  necrotizing fasciitis.
B)  erysipelas.
C)  impetigo.
D)  scarlet fever.
E)  scalded skin syndrome.F) A) and E)
G) A) and C)

Question 19

The majority of otitis media in children is mainly due to infection with:

Accepted Answer

A)  Streptococcus pneumoniae.
B)  Streptococcus pyogenes.
C)  Branhamella (Moraxella)  catarrhalis.
D)  Streptococcus agalactiae.
E)  Staphylococcus saprophyticus.F) C) and D)
G) All of the above

Question 20

Rebecca Lancefield differentiated streptococci on the basis of differences in their:

Accepted Answer

A)  cell wall carbohydrates in a serological test.
B)  patterns of hemolysis on blood agar.
C)  ability to produce catalase.
D)  gram stain appearance.
E)  All of the choices are correct.F) A) and D)
G) A) and C)

Exam 18: The Gram-Positive and Gram-Negative Cocci of Medical Importance

Which is incorrect about Staphylococcus aureus food intoxication?

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Which pathogen has drug resistant strains called MRSA?

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The viridans streptococci are:

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Discuss how normal flora Staphylococcus epidermidis can cause disease in the body, and describe the diseases that it causes.

Correct AnswerAnswered by ExamLex AIStaphylococcus epidermidis is a type of ...View AnswerShow Answer

Streptococcus pyogenes causes all the following, except:

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The majority of otitis media in children is mainly due to infection with:

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Streptococcal pharyngitis involves all the following, except:

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A patient has a suspicious skin infection and a culture is taken.Which media would be appropriate to select for staphylococci?

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Streptococcus agalactiae is known as Group _____ streptococci.B

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Neisseria gonorrhoeae is:

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Neisseria meningitidis and Neisseria gonorrhoeae are fastidious, gram-negative cocci that produce oxidase.

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Rebecca Lancefield differentiated streptococci on the basis of differences in their:

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Staphylococcus, Streptococcus, and Neisseria tend to stimulate pus production and are collectively referred to as _____ cocci.

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Pneumovax is a vaccine for prevention of disease caused by strains of Neisseria meningitidis.

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Sue brought her daughter Amy to the pediatrician complaining of a sore throat.The physician examines Amy and observes that her throat is bright red and there are white pus-filled nodules on her tonsils.Which of the following conclusions should be made?

Correct AnswerverifiedShow Answer

Symptoms of Toxic Shock Syndrome include all the following, except:

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The M protein of Streptococcus pyogenes:

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Streptokinase causes the symptoms of scarlet fever.

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Which of the following antibiotics specifically disrupt protein synthesis of streptococci?

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The two important hemolysins of Group A streptococci are _____ and _____.

Correct Answerverifiedstreptolys...View AnswerShow Answer

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Staphylococcus epidermidis is a type of ...
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The two important hemolysins of Group A streptococci are _ and _.

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streptolys...
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