Deck 17: Neisseria Species and Moraxella Catarrhalis

Question 1

What disease can newborns acquire through a birth canal infected with Neisseria gonorrhoeae?

A)Conjunctivitis
B)Ophthalmia neonatorum
C)Ophthalmitis
D)Blindness

Answer 1

B
Newborns can acquire ophthalmia neonatorum, a gonococcal eye infection, during vaginal delivery through an infected birth canal.This condition, which can result in blindness if not treated immediately, is rare in the United States because application of antimicrobial eye drops, generally erythromycin, is legally required at the birth of every infant.

Question 2

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

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

Answer 2

D
The pathogenic Neisseria spp.have several characteristics that contribute to their virulence.These virulence factors include the presence of the following: receptors for human transferring, capsule, pili, cell-membrane proteins, endotoxin, and IgA protease that cleaves IgA on mucosal surfaces.

Question 3

All Neisseria spp.are generally all of the following except:

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

Answer 3

A
Essentially all Neisseria species are aerobic, nonmotile, non-spore-forming, cytochrome oxidase and catalase positive, and gram-negative diplococci.

Question 4

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 5

Why do Thayer-Martin and Martin-Lewis media have antibiotics added?

A)To permit the growth of Neisseria spp., Mycoplasma spp., and Ureaplasma spp., because these organisms use the antibiotics 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 flora

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

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 8

What does bloodborne dissemination of Neisseria gonorrhoeae usually result in?

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

Question 9

What Neisseria spp.can be found as part of the transient flora of the upper respiratory tract?

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

Question 10

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

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

Question 11

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

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

Question 12

Gonococcal infections occur primarily in all the following sites except:

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

Question 13

If a female is symptomatic, what are the symptoms of Neisseria gonorrhoeae infection in women?

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

Question 14

To which category do most Neisseria spp.belong?

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

Question 15

A microbiologist is reading CTA sugars from a vaginal culture that grew an oxidase-positive, gram-negative cocci.Only the glucose tube is yellow.What is the organism?

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

Question 16

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

A)Many polymorphonuclear white blood cells, some with gram-negative intracellular diplococci and gram-negative diplococci
B)Many mononuclear white blood cells, 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 17

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

A)Urine
B)Throat culture
C)Purulent discharge
D)Stool

Question 18

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

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

Question 19

How should a specimen for Neisseria gonorrhoeae 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 20

How are Neisseria gonorrhoeae infections transmitted?

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

Question 21

A microbiologist is reading CTA sugars.The maltose and glucose tubes are positive.What organism produces acid in these two tubes?

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

Question 22

What antibiotics are recommended for treatment of uncomplicated gonococcal infections?

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

Question 23

A microbiologist receives cerebrospinal fluid (CSF) in the laboratory and does a Gram stain on it.Much to her surprise, 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

Question 24

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 25

All of the following include disadvantages of nucleic acid probes for Neisseria gonorrhoeae except:

A)similar detection sensitivity for cervical cultures in females.
B)not approved for pharyngeal or rectal specimens.
C)do not allow for recovery of an organism to be used for antimicrobial susceptibility testing.
D)are able to identify all N.gonorrhoeae isolates, including b-lactamase-positive strains.

Question 26

What organism is a commensal of the upper respiratory tract and has become an opportunistic pathogen causing upper respiratory tract infections in otherwise healthy children and the elderly?

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

Question 27

Nonpathogenic commensal Neisseria spp.include all the following except:

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

Question 28

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

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

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 spread?

A)Contaminated food
B)Respiratory droplets
C)Airborne
D)Bloodborne

Question 31

A young adult goes to the emergency room 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