Chapter 17 Neisseria Species and Moraxella cararrhalis

question

Typically, all Neisseria spp. are all of the following, except

answer

motile

question

To which category do most Neisseria spp. belong?

answer

Capnophilic

question

Which of the following can be found as part of the commensal biota of the upper respiratory tract?

answer

N. meningitidis

question

Gonococcal infections occur primarily in all the following sites, except

answer

uterus

question

The virulence factors for Neisseria spp. include all the following, except

answer

exotoxin

question

How are Neisseria gonorrhoeae infections transmitted?

answer

Sexual contact

question

What is the most common manifestation of Neisseria gonorrhoeae infection in men?

answer

Purulent urethral discharge and dysuria

question

What does blood-borne dissemination of Neisseria gonorrhoeae usually result in?

answer

Purulent arthritis

question

If a female is symptomatic, what are the most common symptoms of Neisseria gonorrhoeae infection?

answer

Cervical discharge and dysuria

question

What is a major cause of pelvic inflammatory disease in women?

answer

Untreated gonococcal cervicitis

question

What disease is most commonly associated with newborns passing through a birth canal infected with Neisseriagonorrhoeae?

answer

Ophthalmia neonatorum

question

What is the specimen of choice in males for genital infections?

answer

Purulent urethral discharge

question

How should a specimen for Neisseria gonorrhoeae culture be transported to the laboratory?

answer

Placed in Amies with charcoal transport system and transported to the laboratory immediately

question

If a male is infected with Neisseria gonorrhoeae, what would be the results of a Gram stain of purulent urethral discharge reveal?

answer

Many polymorphonuclear white blood cells, some with gram-negative intracellular diplococci, and gram-negative diplococci

question

If a Gram stain of urethral discharge from a male has more than four polymorphonuclear leukocytes per field but no bacteria, what organism is suspected of causing the infection?

answer

Chlamydia trachomatis

question

What type of swab should be used for a Neisseria gonorrhoeae culture?

answer

Dacron

question

Why do Thayer-Martin and Martin-Lewis media have antimicrobial agents added?

answer

To prevent overgrowth of normal biota

question

Under what conditions should inoculated plates for Neisseria gonorrhoeae culture be incubated?

answer

35° C and 3% to 5% carbon dioxide

question

A microbiologist reading genital cultures on a Martin-Lewis plate should look for what colony morphology if Neisseria gonorrhoeae is suspected?

answer

Small, tan, translucent

question

An oxidase-positive, gram-negative diplococcus produces bubbles in 30% hydrogen peroxide. What is the organism?

answer

N. gonorrhoeae

question

Which of the following is characteristic of Moraxella catarrhalis?

answer

Tributyrin positive

question

What antimicrobial agents are recommended for treatment of uncomplicated gonococcal infections?
Correct!

answer

Cephalosporins

question

How is Neisseria meningitidis most commonly spread?

answer

Respiratory droplets

question

The symptoms of meningococcal meningitis include all of the following, except

answer

backache

question

A young adult goes to the emergency department complaining of headache, dizziness, stiff neck, and purpura with a petechial skin rash. What two tests should the physician immediately perform?

answer

Blood and cerebrospinal fluid (CSF) culture

question

What is the name of the condition in which there is hemorrhage in the adrenal glands?

answer

Waterhouse-Friderichsen syndrome

question

A microbiologist does a Gram stain on a CSF. She sees intracellular and extracellular gram-negative diplococci. What is the most likely organism?

answer

N. meningitidis

question

What media should be used to isolate Neisseria meningitidisfrom respiratory samples?

answer

Selective and nonselective

question

In a carbohydrate substrate test, a gram-negative diplococcus produces acid only from glucose and maltose. You should suspect

answer

N. meningitidis

question

What organism is a commensal of the upper respiratory tract and has become an opportunistic pathogen causing upper and lower respiratory tract infections in otherwise healthy children and the older adults?
Correct!

answer

Moraxella catarrhalis

question

Nonpathogenic commensal Neisseria spp. include all the following, except

answer

N. meningitidis

1 of 31

question

Typically, all Neisseria spp. are all of the following, except

answer

motile

question

To which category do most Neisseria spp. belong?

answer

Capnophilic

question

Which of the following can be found as part of the commensal biota of the upper respiratory tract?

answer

N. meningitidis

question

Gonococcal infections occur primarily in all the following sites, except

answer

uterus

question

The virulence factors for Neisseria spp. include all the following, except

answer

exotoxin

question

How are Neisseria gonorrhoeae infections transmitted?

answer

Sexual contact

question

What is the most common manifestation of Neisseria gonorrhoeae infection in men?

answer

Purulent urethral discharge and dysuria

question

What does blood-borne dissemination of Neisseria gonorrhoeae usually result in?

answer

Purulent arthritis

question

If a female is symptomatic, what are the most common symptoms of Neisseria gonorrhoeae infection?

answer

Cervical discharge and dysuria

question

What is a major cause of pelvic inflammatory disease in women?

answer

Untreated gonococcal cervicitis

question

What disease is most commonly associated with newborns passing through a birth canal infected with Neisseriagonorrhoeae?

answer

Ophthalmia neonatorum

question

What is the specimen of choice in males for genital infections?

answer

Purulent urethral discharge

question

How should a specimen for Neisseria gonorrhoeae culture be transported to the laboratory?

answer

Placed in Amies with charcoal transport system and transported to the laboratory immediately

question

If a male is infected with Neisseria gonorrhoeae, what would be the results of a Gram stain of purulent urethral discharge reveal?

answer

Many polymorphonuclear white blood cells, some with gram-negative intracellular diplococci, and gram-negative diplococci

question

If a Gram stain of urethral discharge from a male has more than four polymorphonuclear leukocytes per field but no bacteria, what organism is suspected of causing the infection?

answer

Chlamydia trachomatis

question

What type of swab should be used for a Neisseria gonorrhoeae culture?

answer

Dacron

question

Why do Thayer-Martin and Martin-Lewis media have antimicrobial agents added?

answer

To prevent overgrowth of normal biota

question

Under what conditions should inoculated plates for Neisseria gonorrhoeae culture be incubated?

answer

35° C and 3% to 5% carbon dioxide

question

A microbiologist reading genital cultures on a Martin-Lewis plate should look for what colony morphology if Neisseria gonorrhoeae is suspected?

answer

Small, tan, translucent

question

An oxidase-positive, gram-negative diplococcus produces bubbles in 30% hydrogen peroxide. What is the organism?

answer

N. gonorrhoeae

question

Which of the following is characteristic of Moraxella catarrhalis?

answer

Tributyrin positive

question

What antimicrobial agents are recommended for treatment of uncomplicated gonococcal infections?
Correct!

answer

Cephalosporins

question

How is Neisseria meningitidis most commonly spread?

answer

Respiratory droplets

question

The symptoms of meningococcal meningitis include all of the following, except

answer

backache

question

A young adult goes to the emergency department complaining of headache, dizziness, stiff neck, and purpura with a petechial skin rash. What two tests should the physician immediately perform?

answer

Blood and cerebrospinal fluid (CSF) culture

question

What is the name of the condition in which there is hemorrhage in the adrenal glands?

answer

Waterhouse-Friderichsen syndrome

question

A microbiologist does a Gram stain on a CSF. She sees intracellular and extracellular gram-negative diplococci. What is the most likely organism?

answer

N. meningitidis

question

What media should be used to isolate Neisseria meningitidisfrom respiratory samples?

answer

Selective and nonselective

question

In a carbohydrate substrate test, a gram-negative diplococcus produces acid only from glucose and maltose. You should suspect

answer

N. meningitidis

question

answer

Moraxella catarrhalis

question

Nonpathogenic commensal Neisseria spp. include all the following, except

answer

N. meningitidis

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Chapter 17 Neisseria Species and Moraxella cararrhalis

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