MMSC 428 FINAL EXAM newest actual 2025/2026 QUESTIONS
WITH CORRECT ANSWERS GRADED A+ /VERIFIED
An isolate of Neisseria recovered from a throat culture
demonstrates utilization of glucose, maltose, and lactose.
What is the identification? - ----Answers---Neisseria
lactamica
Sorbitol MacConkey agar (SMAC) is a selective and differential
culture media used to detect which organism? - ----Answers-
--E. coli O157
Which organism is the causative agent of Granuloma
inguinale? - ----Answers---Klebsiella granulomatis
Which letter is used to designate the flagellar antigen found on
members of the Enterobacterales? - ----Answers---H
Which Shigella species is ornithine decarboxylase positive and
the most common species in the United States? - ----
Answers---S. sonnei
Which organism demonstrates swarming motility on agar
plates? - ----Answers---Proteus vulgaris
,Which organism is the causative agent of Plague? - ----
Answers---Yersinia pestis
T/F The Aerotolerance test, to determine whether an organism
is an anaerobe or not, can be performed with primary isolation
media or with subcultured isolates. - ----Answers---true
Which of the following is the most common cause of hospital-
acquired (nosocomial) diarrhea? - ----Answers---C. difficle
Anaerobic culture from a lung abscess collected via needle
and syringe yields heavy growth on CDC anaerobic blood agar
of thin, fusiform Gram-negative bacilli. You should suspect: - -
---Answers---Fusobacterium nucleatum
The most common causative agent of Lemierre's syndrome is:
- ----Answers---Fusobacterium necrophorum
Which organism is most commonly associated with gas
gangrene (myonecrosis)? - ----Answers---Clostridium
perfringens
The most optimal anaerobic culture media setup should
include CDC anaerobic blood agar, PEA, BBE, and: - ----
Answers---LKV
, T/F Formed stool specimens submitted for Clostridioides
difficile testing should be rejected by the laboratory. - ----
Answers---true
All of the following are acceptable methods to create
anaerobic environments for anaerobic culture incubation,
except: - ----Answers---ziploc bag
Which organism causes "lumpy jaw" and produces sulfur
granules? - ----Answers---Actinomyces israelii
A 50 year-old woman comes to the emergency department
with severe back spasms and intermittent bouts of trismus.
She reports previously cutting her hand on a rusty nail in her
shed when gathering her gardening supplies. Which organism
should you suspect? - ----Answers---Clostridium tetani
Which of the following specimens would be unsuitable for
anaerobic culture? - ----Answers---sputum
Colonies of the Bacteroides fragilis group appear black on BBE
agar due to: - ----Answers---esculin hydrolysis
Which organism will fluoresce under long-wave UV light? - ---
-Answers---Porphyromonas asaccharolytica
WITH CORRECT ANSWERS GRADED A+ /VERIFIED
An isolate of Neisseria recovered from a throat culture
demonstrates utilization of glucose, maltose, and lactose.
What is the identification? - ----Answers---Neisseria
lactamica
Sorbitol MacConkey agar (SMAC) is a selective and differential
culture media used to detect which organism? - ----Answers-
--E. coli O157
Which organism is the causative agent of Granuloma
inguinale? - ----Answers---Klebsiella granulomatis
Which letter is used to designate the flagellar antigen found on
members of the Enterobacterales? - ----Answers---H
Which Shigella species is ornithine decarboxylase positive and
the most common species in the United States? - ----
Answers---S. sonnei
Which organism demonstrates swarming motility on agar
plates? - ----Answers---Proteus vulgaris
,Which organism is the causative agent of Plague? - ----
Answers---Yersinia pestis
T/F The Aerotolerance test, to determine whether an organism
is an anaerobe or not, can be performed with primary isolation
media or with subcultured isolates. - ----Answers---true
Which of the following is the most common cause of hospital-
acquired (nosocomial) diarrhea? - ----Answers---C. difficle
Anaerobic culture from a lung abscess collected via needle
and syringe yields heavy growth on CDC anaerobic blood agar
of thin, fusiform Gram-negative bacilli. You should suspect: - -
---Answers---Fusobacterium nucleatum
The most common causative agent of Lemierre's syndrome is:
- ----Answers---Fusobacterium necrophorum
Which organism is most commonly associated with gas
gangrene (myonecrosis)? - ----Answers---Clostridium
perfringens
The most optimal anaerobic culture media setup should
include CDC anaerobic blood agar, PEA, BBE, and: - ----
Answers---LKV
, T/F Formed stool specimens submitted for Clostridioides
difficile testing should be rejected by the laboratory. - ----
Answers---true
All of the following are acceptable methods to create
anaerobic environments for anaerobic culture incubation,
except: - ----Answers---ziploc bag
Which organism causes "lumpy jaw" and produces sulfur
granules? - ----Answers---Actinomyces israelii
A 50 year-old woman comes to the emergency department
with severe back spasms and intermittent bouts of trismus.
She reports previously cutting her hand on a rusty nail in her
shed when gathering her gardening supplies. Which organism
should you suspect? - ----Answers---Clostridium tetani
Which of the following specimens would be unsuitable for
anaerobic culture? - ----Answers---sputum
Colonies of the Bacteroides fragilis group appear black on BBE
agar due to: - ----Answers---esculin hydrolysis
Which organism will fluoresce under long-wave UV light? - ---
-Answers---Porphyromonas asaccharolytica
