Advanced Micro Exam 3 Test Questions with
Verified Answers
Which two bioterrorism organisms can show bipolar staining on the gram stain?- -
Page | 1
Yersinia pestis & Burkholderia pseudomallei
Illustration of a Gram-negative, oxidase negative organism on chocolate agar at 72 hours
with no growth on MacConkey agar. It is most likely to be:- -Francisella tularensis
What are some things to consider with potential bioterrorism agents. Select all that apply.-
-Patient travel history, gram stain results, growth and/or no growth on routine culture
plates
This group of laboratories are responsible for specialized strain characterization and
tracking biothreat agency activity:- -National labs
A vacationing man from Georgia came into the family practice clinic complaining of
respiratory problems. A direct Calcifluor White exam from a sputum specimen revealed a
large, thick-walled yeast with broad based buds. The most likely organism would be:-
-Blastomyces dermatitidis
"Valley Fever" is:- -1° Coccidioidomycosis
Thick-walled yeast cells with single buds attached by a broad base, which are observed in
an aspirated clinical specimen, indicates that the etiologic agent is probably:- -
Blastomyces dermatitidis
An intracellular mycotic infection of the Reticulo-endothelial system would implicate
which of the following:- -Histoplasma capsulatum
, Exudate from a lesion of the mouth of a patient in South America was sent to the lab and
inoculated for a fungal culture. The mold phase of an organism grew on PDA showing a
folded, white, glabrous colony and the yeast phase showed cream, waxy colonies. The
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lactophenol blue stain of this organism is pictured below. What is organism identification?-
-Paracoccidioides brasilliensis
You suspect the organism pictured below is Yersinia pestis. You performed biochemical
tests to try to rule out this organism. Which of the following results would help to confirm
your suspicions that it is Yersinia pestis?- -Catalase positive
Bacillus anthracis is primarily a disease of animals. This condition is known as:- -
Anthrax
Which of the following organisms grows on MacConkey agar?- -Yersinia pestis
What is the role of a sentinel laboratory?- -Early detection and rule-out of biothreat
agents
A key characteristic of Bacillus anthracis is:- -Non-hemolytic on sheep blood agar
A key characteristic of Yersinia pestis is: - -Gram-negative bacillus
Yersinia pestis is primarily transmitted by: - -Fleas
Tuberculate macroconidia are characteristic of: - -Histoplasma capsulatum
Verified Answers
Which two bioterrorism organisms can show bipolar staining on the gram stain?- -
Page | 1
Yersinia pestis & Burkholderia pseudomallei
Illustration of a Gram-negative, oxidase negative organism on chocolate agar at 72 hours
with no growth on MacConkey agar. It is most likely to be:- -Francisella tularensis
What are some things to consider with potential bioterrorism agents. Select all that apply.-
-Patient travel history, gram stain results, growth and/or no growth on routine culture
plates
This group of laboratories are responsible for specialized strain characterization and
tracking biothreat agency activity:- -National labs
A vacationing man from Georgia came into the family practice clinic complaining of
respiratory problems. A direct Calcifluor White exam from a sputum specimen revealed a
large, thick-walled yeast with broad based buds. The most likely organism would be:-
-Blastomyces dermatitidis
"Valley Fever" is:- -1° Coccidioidomycosis
Thick-walled yeast cells with single buds attached by a broad base, which are observed in
an aspirated clinical specimen, indicates that the etiologic agent is probably:- -
Blastomyces dermatitidis
An intracellular mycotic infection of the Reticulo-endothelial system would implicate
which of the following:- -Histoplasma capsulatum
, Exudate from a lesion of the mouth of a patient in South America was sent to the lab and
inoculated for a fungal culture. The mold phase of an organism grew on PDA showing a
folded, white, glabrous colony and the yeast phase showed cream, waxy colonies. The
Page | 2
lactophenol blue stain of this organism is pictured below. What is organism identification?-
-Paracoccidioides brasilliensis
You suspect the organism pictured below is Yersinia pestis. You performed biochemical
tests to try to rule out this organism. Which of the following results would help to confirm
your suspicions that it is Yersinia pestis?- -Catalase positive
Bacillus anthracis is primarily a disease of animals. This condition is known as:- -
Anthrax
Which of the following organisms grows on MacConkey agar?- -Yersinia pestis
What is the role of a sentinel laboratory?- -Early detection and rule-out of biothreat
agents
A key characteristic of Bacillus anthracis is:- -Non-hemolytic on sheep blood agar
A key characteristic of Yersinia pestis is: - -Gram-negative bacillus
Yersinia pestis is primarily transmitted by: - -Fleas
Tuberculate macroconidia are characteristic of: - -Histoplasma capsulatum
