Medical
Bacteriology Lab
Exam 2 Questions
and Complete
Solutions Graded
Denning [Date] [Course title]
, The ONPG test determines the ability for the organism to utilize what sugar? - Answer: Lactose
Once acidified, the phenol red indicator in manydifferent medias convert to what color? - Answer:
yellow
True or False: Chocolate agar has cocoa powder in it toenhance fastidious organism growth - Answer:
False
What is the gram stain and morphology of Neisseria/Moraxella catarrhalis under the microscope? -
Answer: gram-negative diplococci
Given the options, which plate should you obtain acolony from when performing the oxidase test?◦ A.
MacConkey◦ B. Nutrient agar - Answer: B. nutrient agar
M. catarrhalis was previously placed in a separate genus named what? - Answer: Branhamella
What was used to justify inclusion of the species M.catarrhalis in the genus Moraxella? - Answer: DNA
hybridization studies and 16S rRNAsequence comparisons
Which Neisseria app. is fastidious? - Answer: N. gonorrhoeae
What agar is best used to grow N. gonorrhoeae? - Answer: Chocolate and MTM agar
In what conditions does N. gonorrheae grow under? How is this achieved in a laboratory setting? -
Answer: CO2 and candle jars
What kind of pathogen is Morexella catarrhalis? - Answer: opportunistic
What are two common infections caused by M. catarrhalis? - Answer: Otitis media (ear infection) and
upper respiratory infection
Bacteriology Lab
Exam 2 Questions
and Complete
Solutions Graded
Denning [Date] [Course title]
, The ONPG test determines the ability for the organism to utilize what sugar? - Answer: Lactose
Once acidified, the phenol red indicator in manydifferent medias convert to what color? - Answer:
yellow
True or False: Chocolate agar has cocoa powder in it toenhance fastidious organism growth - Answer:
False
What is the gram stain and morphology of Neisseria/Moraxella catarrhalis under the microscope? -
Answer: gram-negative diplococci
Given the options, which plate should you obtain acolony from when performing the oxidase test?◦ A.
MacConkey◦ B. Nutrient agar - Answer: B. nutrient agar
M. catarrhalis was previously placed in a separate genus named what? - Answer: Branhamella
What was used to justify inclusion of the species M.catarrhalis in the genus Moraxella? - Answer: DNA
hybridization studies and 16S rRNAsequence comparisons
Which Neisseria app. is fastidious? - Answer: N. gonorrhoeae
What agar is best used to grow N. gonorrhoeae? - Answer: Chocolate and MTM agar
In what conditions does N. gonorrheae grow under? How is this achieved in a laboratory setting? -
Answer: CO2 and candle jars
What kind of pathogen is Morexella catarrhalis? - Answer: opportunistic
What are two common infections caused by M. catarrhalis? - Answer: Otitis media (ear infection) and
upper respiratory infection
