Question 1

Which two organisms should be used to determine the validity of the nitrate reduction test?

Accepted Answer

A)  N.gonorrhoeae and N.lactamica
B)  Neisseria mucosa and M.catarrhalis
C)  N.lactamica and M.catarrhalis
D)  Neisseria sicca and Neisseria subflavaE) A) and B)
F) None of the above

Question 2

M.catarrhalis may be described as:

Accepted Answer

A)  oxidase-positive.
B)  a glucose utilizer.
C)  a major cause of venereal disease.
D)  often carrying an antiphagocytic capsule.E) None of the above
F) All of the above A

Question 3

An organism isolated from a sputum sample that has a "hockey puck" consistency would have which of the following biochemical profiles?

Accepted Answer

A)  Glucose-positive,maltose-positive,and lactose-positive
B)  Glucose-positive,maltose-positive,and lactose-negative
C)  Glucose-positive,maltose-negative,and lactose-negative
D)  Glucose-negative,maltose-negative,and lactose-negativeE) All of the above
F) None of the above

Question 4

Gonococci require which of the following nutrients for growth?

Accepted Answer

A)  Arginine
B)  Hypoxanthine
C)  Uracil
D)  IsoVitaleXE) A) and B)
F) All of the above

Question 5

MTM,Martin-Lewis (ML) ,and New York City (NYC) media were all developed for the selective isolation of which organism?

Accepted Answer

A)  M.catarrhalis
B)  Chlamydia trachomatis
C)  N.gonorrhoeae
D)  N.mucosaE) None of the above
F) B) and C)

Question 6

The determination of carbohydrate utilization patterns for the differentiation of Neisseria spp.and M.catarrhalis is best performed by:

Accepted Answer

A)  incubation of inoculated cysteine trypticase soy agar (CT
A)  with 1% dextrose,maltose,lactose,and sucrose for 48 to 72 hours.
B)  oxidative-fermentative (OF) medium with dextrose,maltose,lactose,and sucrose.
C)  heavy inoculation of buffered,low-peptone substrate with dextrose,maltose,lactose,and sucrose.
D)  carbohydrate testing strips.E) B) and D)
F) All of the above C

Question 7

The second most commonly reported sexually transmitted infection in the United States,according to the CDC,is:

Accepted Answer

A)  M.catarrhalis.
B)  N.gonorrhoeae.
C)  N.meningitidis.
D)  HIV.E) None of the above
F) All of the above

Question 8

The gram-negative coccus that can be described as oxidase-positive,glucose-negative,maltose-negative,sucrose-negative,lactose-negative,and DNase-positive is:

Accepted Answer

A)  N.meningitidis.
B)  M.catarrhalis.
C)  Neisseria cinerea.
D)  N.gonorrhoeae.E) None of the above
F) A) and C) B

Question 9

Gram-negative diplococci are isolated from a genital specimen and yield the following results:
·Glucose: positive
·Maltose: negative
·Lactose: negative
The organism can be identified as:

Accepted Answer

A)  N.gonorrhoeae.
B)  Neisseria meningitidis.
C)  Neisseria lactamica.
D)  M.catarrhalis.E) B) and C)
F) A) and C)

Question 10

N.gonorrhoeae is spread by:

Accepted Answer

A)  person-to-person nosocomial spread by respiratory droplets.
B)  person-to-person spread by sexual contact.
C)  from infected mother to newborn during birth.
D)  B and C only.E) A) and B)
F) None of the above

Question 11

An advantage of all molecular assays is:

Accepted Answer

A)  the ability to test for C.trachomatis from the same specimen at the same time.
B)  the ability to use these tests for assessing the successfulness of treatment.
C)  their role as evidence in medicolegal cases.
D)  the ability to detect the capsular antigen in body fluids.E) None of the above
F) B) and C)

Question 12

Which statement is true regarding the pathogenesis of N.cinerea?

Accepted Answer

A)  N.cinerea is a leading cause of fatal bacterial meningitis.
B)  Virulence factors include pili,capsule formation,and endotoxin.
C)  Disseminated intravascular coagulation (DI
C)  and thrombocytopenia are complications of infection.
D)  N.cinerea is commonly encountered as a contaminant in clinical specimens.E) None of the above
F) B) and C)

Question 13

A gram-negative diplococcus grew on 5% sheep blood agar and chocolate agar,had scant growth on MacConkey agar,and had no growth on modified Thayer-Martin (MTM) agar.The organism was identified as N.sicca.Which one of the following statements explains the discrepancy of the results obtained on the MTM agar?

Accepted Answer

A)  The medium was most likely expired.
B)  The organism was most likely incorrectly transported.
C)  The organism was most likely incubated at 35°C instead of 25°C.
D)  No discrepancy is present.N.sicca does not grow on MTM agar.E) B) and C)
F) All of the above

Question 14

Which one of the following statements is true regarding antimicrobial therapy and susceptibility testing?

Accepted Answer

A)  Cephalosporins and macrolides are ineffective against M.catarrhalis.
B)  Resistance to quinolones is emerging in strains of N.gonorrhoeae.
C)  Most Neisseria spp.are resistant to penicillin.
D)  Most strains of N.meningitidis are resistant to penicillin.E) B) and C)
F) None of the above

Question 15

The differentiation of the similar M.catarrhalis and Neisseria can be best accomplished by:

Accepted Answer

A)  examination of Gram stain of the colony.
B)  vancomycin susceptibility testing.
C)  the oxidase test.
D)  carbohydrate utilization testing.E) B) and D)
F) All of the above

Question 16

An endocervical swab was collected from a 26-year-old woman with a purulent discharge.The Gram stain revealed the following:
·Many white blood cells (WBCs) 
·Moderate gram-negative diplococci
·Moderate gram-negative coccobacilli
·Few yeast
Based on these findings,what would be the next course of action?

Accepted Answer

A)  Report the isolation of Neisseria gonorrhoeae.
B)  Work up the yeast.
C)  Report the Gram stain,and follow up with culture.
D)  Request a new specimen;this one is contaminated.E) B) and D)
F) A) and D)

Question 17

Organisms belonging to the genus Neisseria are:

Accepted Answer

A)  gram-positive diplococci.
B)  gram-negative diplococci.
C)  gram-negative coccobacilli.
D)  gram-negative bacilli.E) B) and C)
F) B) and D)

Question 18

M.catarrhalis can be described as a:

Accepted Answer

A)  gram-positive diplococcus.
B)  gram-negative diplococcus.
C)  gram-negative coccobacillus.
D)  gram-negative bacillus.E) C) and D)
F) B) and D)

Question 19

M.catarrhalis may be differentiated from gonococci and meningococci on the basis of its:

Accepted Answer

A)  growth on blood agar at 35°C.
B)  growth on nutrient agar at 22°C.
C)  reduction of nitrite to nitrate.
D)  production of DNase.E) All of the above
F) A) and B)

Question 20

Blood cultures collected for the recovery of N.gonorrhoeae or N.meningitidis require:

Accepted Answer

A)  no special methods.
B)  more than 0.025% sodium polyanethol sulfonate (SPS) .
C)  transfer from Vacutainer tubes to culture broth within 1 hour of collection.
D)  less than 0.025% SPS.E) A) and B)
F) C) and D)

Exam 38: Neisseria and Moraxella Catarrhalis

Which two organisms should be used to determine the validity of the nitrate reduction test?

Correct Answer
verified

M.catarrhalis may be described as:

Correct Answer
verified
A

An organism isolated from a sputum sample that has a "hockey puck" consistency would have which of the following biochemical profiles?

Correct Answer
verified

Gonococci require which of the following nutrients for growth?

Correct Answer
verified

MTM,Martin-Lewis (ML) ,and New York City (NYC) media were all developed for the selective isolation of which organism?

Correct Answer
verified

The determination of carbohydrate utilization patterns for the differentiation of Neisseria spp.and M.catarrhalis is best performed by:

Correct Answer
verified
C

The second most commonly reported sexually transmitted infection in the United States,according to the CDC,is:

Correct Answer
verified

The gram-negative coccus that can be described as oxidase-positive,glucose-negative,maltose-negative,sucrose-negative,lactose-negative,and DNase-positive is:

Correct Answer
verified
B

Gram-negative diplococci are isolated from a genital specimen and yield the following results: ·Glucose: positive ·Maltose: negative ·Lactose: negative The organism can be identified as:

Correct Answer
verified

N.gonorrhoeae is spread by:

Correct Answer
verified

An advantage of all molecular assays is:

Correct Answer
verified

Which statement is true regarding the pathogenesis of N.cinerea?

Correct Answer
verified

Correct Answer
verified

Which one of the following statements is true regarding antimicrobial therapy and susceptibility testing?

Correct Answer
verified

The differentiation of the similar M.catarrhalis and Neisseria can be best accomplished by:

Correct Answer
verified

Correct Answer
verified

Organisms belonging to the genus Neisseria are:

Correct Answer
verified

M.catarrhalis can be described as a:

Correct Answer
verified

M.catarrhalis may be differentiated from gonococci and meningococci on the basis of its:

Correct Answer
verified

Blood cultures collected for the recovery of N.gonorrhoeae or N.meningitidis require:

Correct Answer
verified

Exam 38: Neisseria and Moraxella Catarrhalis

Which two organisms should be used to determine the validity of the nitrate reduction test?

Correct AnswerverifiedShow Answer

M.catarrhalis may be described as:

Correct AnswerverifiedA

An organism isolated from a sputum sample that has a "hockey puck" consistency would have which of the following biochemical profiles?

Correct AnswerverifiedShow Answer

Gonococci require which of the following nutrients for growth?

Correct AnswerverifiedShow Answer

MTM,Martin-Lewis (ML) ,and New York City (NYC) media were all developed for the selective isolation of which organism?

Correct AnswerverifiedShow Answer

The determination of carbohydrate utilization patterns for the differentiation of Neisseria spp.and M.catarrhalis is best performed by:

Correct AnswerverifiedC

The second most commonly reported sexually transmitted infection in the United States,according to the CDC,is:

Correct AnswerverifiedShow Answer

The gram-negative coccus that can be described as oxidase-positive,glucose-negative,maltose-negative,sucrose-negative,lactose-negative,and DNase-positive is:

Correct AnswerverifiedB

Gram-negative diplococci are isolated from a genital specimen and yield the following results: ·Glucose: positive ·Maltose: negative ·Lactose: negative The organism can be identified as:

Correct AnswerverifiedShow Answer

N.gonorrhoeae is spread by:

Correct AnswerverifiedShow Answer

An advantage of all molecular assays is:

Correct AnswerverifiedShow Answer

Which statement is true regarding the pathogenesis of N.cinerea?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which one of the following statements is true regarding antimicrobial therapy and susceptibility testing?

Correct AnswerverifiedShow Answer

The differentiation of the similar M.catarrhalis and Neisseria can be best accomplished by:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Organisms belonging to the genus Neisseria are:

Correct AnswerverifiedShow Answer

M.catarrhalis can be described as a:

Correct AnswerverifiedShow Answer

M.catarrhalis may be differentiated from gonococci and meningococci on the basis of its:

Correct AnswerverifiedShow Answer

Blood cultures collected for the recovery of N.gonorrhoeae or N.meningitidis require:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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A

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C

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B

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