Part 4 Flashcards
What does the Snyder test indicate? Susceptibility to:
A.) Aphthous Ulcers
B.) Gingivitis
C.) Dental caries
D.) Laryngitis
E.) Dermatitis
C.) Dental caries
Most resident bacteria in the human body, as well as human pathogens, are classified as:
A.) Thermophiles
B.) Mesophiles
C.) Psychrophiles
D.) Facultative thermophiles
E.) Psychotrophs
B.) Mesophiles
What medium is used for the antimicrobial susceptibility test?
A.) Mueller-Hinton Agar
B.) Desoxycholate Agar
C.) Mannitol Salt Agar
D.) MacConkey Agar
E.) Phenyl Ethyl Alcohol Agar
A.) Mueller-Hinton Agar
On a Mueller-Hinton Agar plate, what does the presence of a zone of inhibition around a microorganism indicate about that microorganism and the antimicrobial applied to it?
A.) The microorganism is immune to that antimicrobial
B.) The microorganism is susceptible to the antimicrobial
C.) The microorganism secretes the same antibiotics
D.) The microorganism is unaffected by the antimicrobial
E.) None of the above
B.) The microorganism is susceptible to the antimicrobial
In Gram staining, crystal violet is a primary stain. In Acid-Fast staining, methylene blue is the primary stain.
(True or False)
False
Antibiotics are synthetic antimicrobial agents produced by microorganisms.
(True or False)
False
When adding Kovac’s reagent to an inoculated and incubated SIM medium, a red layer may form at the top of the tube. This is a positive test indicating that Tryptophan is broken down into indole and pyruvate.
(True or False)
True
Where are inoculated tubes of media stored for disposal?
In the toxic waste bin, not the regular trash
Identify the component of the cell wall of an acid-fast bacterium that causes it to have a characteristic staining color at the end of the Ziehl-Neelsen acid fast procedure.
Mycolic acid
