Deck 17: Neisseria Species and Moraxella Catarrhalis

Question 1

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

A) capsule.
B) endotoxin.
C) pili.
D) exotoxin.

Answer 1

D

Question 2

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

A) Neisseria meningitidis
B) N. sicca
C) N. gonorrhoeae
D) N. lactamica

Answer 2

C

Question 3

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

A) Pharyngitis
B) Meningitis
C) Purulent arthritis
D) Pelvic inflammatory disease

Answer 3

C

Question 4

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

A) 35° C and 3% to 5% carbon dioxide
B) 25° C and room air
C) 35° C and room air
D) 25° C and 3% to 5% carbon dioxide

Question 5

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

A) Many polymorphonuclear white blood cells, some with gram-negative intracellular diplococci, and gram-negative diplococci
B) Many mononuclear white blood cells and gram-negative cocci
C) Few white blood cells, many red blood cells and gram-negative rods
D) Many polymorphonuclear white blood cells, some gram-negative intracellular rods, and gram-negative rods

Question 6

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

A) Untreated gonococcal cervicitis
B) Untreated meningococcal cystitis
C) Treated gonococcal cervicitis
D) Treated meningococcal cystitis

Question 7

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?

A) Neisseria meningitidis
B) Chlamydia trachomatis
C) N. gonorrhoeae
D) C. pneumoniae

Question 8

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

A) Large, white, creamy
B) Small, tan, translucent
C) Small, white, transparent
D) Small, rough, transparent

Question 9

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

A) Urine
B) Throat culture
C) Purulent urethral discharge
D) Prostatic fluid

Question 10

How are Neisseria gonorrhoeae infections transmitted?

A) Sexual contact
B) Contaminated food
C) Respiratory droplet
D) Spores

Question 11

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

A) Painful ejaculation and prostatitis
B) Purulent urethral discharge and dysuria
C) Dysuria and prostatitis
D) Purulent urethral discharge and painful ejaculation

Question 12

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

A) Neisseria gonorrhoeae
B) Moraxella catarrhalis
C) N. sicca
D) N. meningitidis

Question 13

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

A) To permit the growth of Neisseria spp., Mycoplasma spp., and Ureaplasma spp., because these organisms use the agents as growth factors
B) To allow the growth of gram-negative rods
C) To allow the growth of gram-positive rods
D) To prevent overgrowth of normal biota

Question 14

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

A) Cotton
B) Calcium alginate
C) Dacron
D) Flax

Question 15

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

A) Endometriosis and pelvic inflammatory disease
B) Diarrhea and endometriosis
C) Purulent arthritis and dysuria
D) Cervical discharge and dysuria

Question 16

To which category do most Neisseria spp. belong?

A) Facultatively anaerobic
B) Capnophilic
C) Anaerobic
D) Facultatively aerobic

Question 17

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

A) motile.
B) aerobic.
C) oxidase positive.
D) catalase positive.

Question 18

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

A) Placed in the paper swab cover and transported to the laboratory at the end of the day
B) Placed in a bacterial transport and transported to the laboratory at the end of the day
C) Placed in a tube of broth and transported to the laboratory immediately
D) Placed in Amies with charcoal transport system and transported to the laboratory immediately

Question 19

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

A) Meningitis
B) Ophthalmia neonatorum
C) Ophthalmitis
D) Gastritis

Question 20

Gonococcal infections occur primarily in all the following sites, except

A) urethra.
B) endocervix.
C) uterus.
D) anal canal.

Question 21

Nonpathogenic commensal Neisseria spp. include all the following, except

A) Neisseria lactamica.
B) N. meningitidis.
C) N. mucosa.
D) N. polysaccharea.

Question 22

Which of the following is characteristic of Moraxella catarrhalis?

A) Acid from glucose only
B) Acid from glucose and maltose only
C) No growth on nutrient agar
D) Tributyrin positive

Question 23

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

A) Cephalosporins
B) Penicillins and macrolides
C) Aminoglycosides and fluoroquinolones
D) Cephalosporins and penicillins

Question 24

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

A) frontal headache.
B) stiff neck.
C) backache.
D) fever.

Question 25

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?

A) Moraxella catarrhalis
B) Neisseria lactamica
C) N. sicca
D) N. gonorrhoeae

Question 26

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?

A) Skin scraping and pupil dilation
B) Genital and throat culture
C) Urine and blood culture
D) Blood and cerebrospinal fluid (CSF) culture

Question 27

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

A) Waterhouse-Friderichsen syndrome
B) Leventhal-Stall disease
C) Waldenström syndrome
D) Niemann-Pick disease

Question 28

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

A) Neisseria gonorrhoeae.
B) N. sicca.
C) N. lactamica.
D) N. meningitidis.

Question 29

What media should be used to isolate Neisseria meningitidis from respiratory samples?

A) Differential and nonselective
B) Specific and nonspecific
C) Selective and nonselective
D) Enriched and nonenriched

Question 30

How is Neisseria meningitidis most commonly spread?

A) Contaminated food
B) Respiratory droplets
C) Arthropods
D) Blood-borne

Question 31

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

A) Neisseria gonorrhoeae
B) N. meningitidis
C) N. lactamica
D) N. sicca