AAB MT Microbiology Actual exam assessment questions
with 100% completely verified answers graded A+ latest
2025/2026
What specimen is usually used for the diagnosis of Hansen's disease? -
correct answer Tissue fluid
What are "lepra" cells? - correct answer Macrophages containing acid-fast
bacilli
Lumpy jaw is caused by which organism? - correct answer Actinomyces
israelii
Which one of the following is anaerobic? - correct answer Actinomyces
israelii
Which of the following organisms is urease positive? - correct answer
Nocardia is urease positive.
NOT Salmonella, Moraxella, or Shigella.
Nocardia will grow on any medium that does not contain... - correct answer
Antibiotics
A fastidious, small to filamentous, Gram-negative rod from a nasopharyngeal
swab is most likely to be which organism? - correct answer Haemophilus
influenzae
,Which medium is preferred for the culture of Haemophilus species? - correct
answer Enriched chocolate agar
Cultures of Staphylococcus aureus supply which of the following to cultures of
Haemophilus? - correct answer V factor
Which organism causes whooping cough? - correct answer Bordatella
pertussis
What is the preferred method for the isolation of Bordatella pertussis? -
correct answer Regan-Lowe medium
Which of the following species of Bordatella are urease-positive and oxidase-
positive? - correct answer B. parapertussis
A Brucella isolate that does not produce H2S, does not require CO2, and is
not inhibited by thionin or basic fuschin is probably which species of Brucella?
- correct answer B. melitensis
A relatively slow growing and fastidious Gram-negative rod that produces a
characteristic brown pigment on Feeley-Gorman iron cysteine agar is most
probably which organism? - correct answer Legionella pneumophila
What is the best medium for the isolation of Legionella? - correct answer
Buffered charcoal yeast extract agar
Which Gram-negative, fastidious bacillus has been isolated from air-
conditioning towers? - correct answer Legionella pneumophila
, Which atmospheric conditions are best for Campylobacter? - correct answer
Obligate microaerophilic
A curved, Gram-negative rod that is nonfermentative, nitrite positive, and
microaerophilic is probably which organism? - correct answer Campylobacter
jejuni
A motile, Gram-negative, slender, curved rod that is the cause of enteritis is
best isolated on which agar? - correct answer Campylobacter blood agar
What does the Campy gas mixture consist of? - correct answer 5% O2, 10%
CO2, 85% N2
Which organism colonizes the human stomach and is associated with peptic
ulcer disease? - correct answer Helicobacter pylori
Clue cells may be found in infections with which organism? - correct answer
Gardnerella vaginalis
What kind of media extends the lag phase of normal flora and decreases the
lag phase of pathogens? - correct answer Enrichment media
Which type of selective media for Salmonella and Shigella uses bromthymol
blue and acid fuschin as indicators? - correct answer Hektoen Enteric (HE)
agar
What is the hydrogen sulfide indicator in triple sugar iron agar? - correct
answer Sodium thiosulfate
with 100% completely verified answers graded A+ latest
2025/2026
What specimen is usually used for the diagnosis of Hansen's disease? -
correct answer Tissue fluid
What are "lepra" cells? - correct answer Macrophages containing acid-fast
bacilli
Lumpy jaw is caused by which organism? - correct answer Actinomyces
israelii
Which one of the following is anaerobic? - correct answer Actinomyces
israelii
Which of the following organisms is urease positive? - correct answer
Nocardia is urease positive.
NOT Salmonella, Moraxella, or Shigella.
Nocardia will grow on any medium that does not contain... - correct answer
Antibiotics
A fastidious, small to filamentous, Gram-negative rod from a nasopharyngeal
swab is most likely to be which organism? - correct answer Haemophilus
influenzae
,Which medium is preferred for the culture of Haemophilus species? - correct
answer Enriched chocolate agar
Cultures of Staphylococcus aureus supply which of the following to cultures of
Haemophilus? - correct answer V factor
Which organism causes whooping cough? - correct answer Bordatella
pertussis
What is the preferred method for the isolation of Bordatella pertussis? -
correct answer Regan-Lowe medium
Which of the following species of Bordatella are urease-positive and oxidase-
positive? - correct answer B. parapertussis
A Brucella isolate that does not produce H2S, does not require CO2, and is
not inhibited by thionin or basic fuschin is probably which species of Brucella?
- correct answer B. melitensis
A relatively slow growing and fastidious Gram-negative rod that produces a
characteristic brown pigment on Feeley-Gorman iron cysteine agar is most
probably which organism? - correct answer Legionella pneumophila
What is the best medium for the isolation of Legionella? - correct answer
Buffered charcoal yeast extract agar
Which Gram-negative, fastidious bacillus has been isolated from air-
conditioning towers? - correct answer Legionella pneumophila
, Which atmospheric conditions are best for Campylobacter? - correct answer
Obligate microaerophilic
A curved, Gram-negative rod that is nonfermentative, nitrite positive, and
microaerophilic is probably which organism? - correct answer Campylobacter
jejuni
A motile, Gram-negative, slender, curved rod that is the cause of enteritis is
best isolated on which agar? - correct answer Campylobacter blood agar
What does the Campy gas mixture consist of? - correct answer 5% O2, 10%
CO2, 85% N2
Which organism colonizes the human stomach and is associated with peptic
ulcer disease? - correct answer Helicobacter pylori
Clue cells may be found in infections with which organism? - correct answer
Gardnerella vaginalis
What kind of media extends the lag phase of normal flora and decreases the
lag phase of pathogens? - correct answer Enrichment media
Which type of selective media for Salmonella and Shigella uses bromthymol
blue and acid fuschin as indicators? - correct answer Hektoen Enteric (HE)
agar
What is the hydrogen sulfide indicator in triple sugar iron agar? - correct
answer Sodium thiosulfate
