Question 1

Thayer-Martin, Martin-Lewis, and New York City media were all developed for the selective isolation of which organism?

Accepted Answer

A) Moraxella catarrhalis 
B) Neisseria meningitidis 
C) Neisseria gonorrhoeae 
D) All of the above are correct. 
A) Moraxella catarrhalis 
B) Neisseria meningitidis 
C) Neisseria gonorrhoeae 
D) All of the above are correct.

Question 2

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) All of the above are true. 
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) All of the above are true.

Question 3

Determination of carbohydrate utilization patterns for differentiation of Neisseria spp.and M.catarrhalis is best done by

Accepted Answer

A) 48- to 72-hour incubation of inoculated cystine trypticase soy agar (CT
A)  with 1% dextrose, maltose, lactose, and sucrose. 
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. 
A) 48- to 72-hour incubation of inoculated cystine trypticase soy agar (CT
A)  with 1% dextrose, maltose, lactose, and sucrose. 
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.

Question 4

Which type of test has the advantage of being able to test for Chlamydia trachomatis and Neisseria gonorrhoeae from the same specimen at the same time?

Accepted Answer

A) Culture 
B) Molecular assays 
C) Enzyme-linked immunosorbent assay (ELIS
A)  
D) All of the above are true. 
A) Culture 
B) Molecular assays 
C) Enzyme-linked immunosorbent assay (ELIS
A)  
D) All of the above are true.

Question 5

An advantage of all molecular assays is

Accepted Answer

A) the ability to test for Chlamydia trachomatis from the same specimen at the same time. 
B) the ability to use them for assessing successfulness of treatment. 
C) their role as evidence in medicolegal cases. 
D) All of the above are true. 
A) the ability to test for Chlamydia trachomatis from the same specimen at the same time. 
B) the ability to use them for assessing successfulness of treatment. 
C) their role as evidence in medicolegal cases. 
D) All of the above are true.

Question 6

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

Question 7

Differentiation of the similar Moraxella catarrhalis and Neisseria can be best accomplished by

Accepted Answer

A) examination of Gram stain of colony. 
B) vancomycin susceptibility testing. 
C) the oxidase test. 
D) glucose utilization testing. 
A) examination of Gram stain of colony. 
B) vancomycin susceptibility testing. 
C) the oxidase test. 
D) glucose utilization testing.

Question 8

M.catarrhalis may be differentiated from the gonococci and meningococci based on

Accepted Answer

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

Question 9

Gonococci require for growth which of the following nutrients?

Accepted Answer

A) Arginine 
B) Hypoxanthine 
C) Uracil 
D) IsoVitaleX 
A) Arginine 
B) Hypoxanthine 
C) Uracil 
D) IsoVitaleX

Exam 39: Neisseria and Moraxella Catarrhalis

Thayer-Martin, Martin-Lewis, and New York City media were all developed for the selective isolation of which organism?

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

Determination of carbohydrate utilization patterns for differentiation of Neisseria spp.and M.catarrhalis is best done by

Which type of test has the advantage of being able to test for Chlamydia trachomatis and Neisseria gonorrhoeae from the same specimen at the same time?

An advantage of all molecular assays is

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

Differentiation of the similar Moraxella catarrhalis and Neisseria can be best accomplished by

M.catarrhalis may be differentiated from the gonococci and meningococci based on

Gonococci require for growth which of the following nutrients?

Microbial Taxonomy

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Laboratory Safety

Specimen Management

Role of Microscopy

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Nucleic Acid-Based Analytic Methods for Microbial Identification and Characterization

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Principles of Antimicrobial Action Resistance

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Alcaligenes, Bordetella Nonpertussis, Comamonas, and Similar Organisms

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The Spirochetes

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