Deck 25: Mycoplasma and Ureaplasma

Question 1

What infectious agent causes the condition primary atypical pneumonia?

A) Mycoplasma hominis
B) M. urealyticum
C) M. fermentans
D) M. pneumoniae

Answer 1

D

Question 2

Mycoplasmas are different from most other bacteria because they do not have a _____.

A) cell wall
B) cell membrane
C) nuclear membrane
D) messenger transporter

Answer 2

A

Question 3

What time frame is suitable for blood draws for serologic testing to diagnose Mycoplasma infections?

A) Onset of symptoms and 2 to 3 weeks later
B) Week after symptoms start and 2 months later
C) Weeks after symptoms start and 3 months later
D) Onset of symptoms and 2 months later

Answer 3

A

Question 4

When Mycoplasma hominis invades the upper genitourinary tract, it can cause the following:

A) Salpingitis
B) Pyelonephritis
C) Pelvic inflammatory disease
D) All of the above

Question 5

Mycoplasma spp. from patient samples are visible by which staining technique?

A) Gram stain
B) Wright stain
C) Acridine orange
D) All of the above

Question 6

At-risk groups for contracting walking pneumonia include all the following, except

A) prisoners.
B) college students.
C) military personnel.
D) preschool children.

Question 7

What organism has been recovered in normal, sexually active females but is also associated with chorioamnionitis, congenital pneumonia, and development of chronic lung disease in premature infants?

A) Mycoplasma hominis
B) Ureaplasma ureolyticus
C) M. penetrans
D) M. fermentans

Question 8

Mycoplasma organisms will grow in which of the following atmospheres?

A) Ambient
B) Capnophilic
C) Anaerobic
D) All of the above

Question 9

When transporting specimens for Mycoplasma culture to the laboratory, extreme care must be taken so that the specimen does not

A) dry out.
B) become contaminated.
C) become overgrown with bacterial normal biota.
D) All of the above

Question 10

What test method is the most commonly used to detect antibodies to Mycoplasma spp.?

A) Complement fixation (CF)
B) Enzyme immunoassay (EIA)
C) Direct fluorescent antibody (DFA)
D) Cellulose ion exchange (CIE)

Question 11

Cultures for Mycoplasma pneumoniae should be incubated for _____.

A) 2 to 3 days
B) 5 to 7 days
C) 10 to 14 days
D) 21 days or more

Question 12

If a newborn has symptoms of meningitis but the cerebrospinal fluid (CSF) is negative for both Gram stain and a routine culture, what organisms should be suspected?

A) Neisseria gonorrhea and Chlamydia trachomatis
B) Treponema pallidum and Borrelia burgdorferi
C) Mycoplasma hominis and Ureaplasma urealyticum
D) M. pneumoniae and C. trachomatis

Question 13

Which of the following organisms was once called "T-strain mycoplasma"?

A) Ureaplasma spp.
B) Mycoplasma hominis
C) Mycoplasma fermentans
D) Mycoplasma orale

Question 14

A 10B broth inoculated with vaginal material turns alkaline after overnight incubation at 35C. Which of the following organisms should you suspect?

A) Mycoplasma pneumoniae
B) M. hominis
C) M. genitalium
D) Ureaplasma urealyticum

Question 15

One of the factors that allows Mycoplasma to infect the respiratory tract and the urogenital tract is that

A) the body has a hard time detecting their presence, because they have no cell wall.
B) they suppress the immune response.
C) they adhere to the epithelium of mucosal surfaces and are not eliminated by mucus secretions.
D) All of the above.

Question 16

Which of the following stains is used to enhance the visibility of mycoplasma-like colonies?

A) Gram stain
B) Acridine orange
C) Dienes stain
D) Wright stain

Question 17

All the following antimicrobial agents are used to treat mycoplasma infections, except

A) macrolides.
B) fluoroquinolones.
C) tetracyclines.
D) penicillin.

Question 18

Which factor is added to media to provide cholesterol for mycoplasma-like organisms?

A) Trypticase soy digest
B) 20% fetal calf serum
C) X and V factor supplement
D) 5% sheep blood

Question 19

Which of the following methods is used to determine the presence of growth in mycoplasma broth media?

A) Broth turbidity
B) Presence of biofilm on surface
C) Change in phenol red pH indicator
D) Release of radiolabeled CO₂

Question 20

What two organisms are associated with urogenital tract infections but have also been isolated from asymptomatic individuals?

A) Mycoplasma hominis and Ureaplasma urealyticum
B) M. hominis and M. fermentans
C) U. urealyticum and M. pneumoniae
D) M. penetrans and M. pneumoniae