Specimen Collection, Media, and Methods

Question 1

Deoxycholate agar (DCA) is useful for the isolation of:

Answer 1

Enterobacteriaceae

Question 2

Xylose lysine deoxycholate (XLD) agar is a highly selective medium used for the recovery of which bacteria?

Answer 2

Enterobacteriaceae from gastro specimens

Question 3

Prereduced and vitamin K1-supplemented blood agar plates are recommended isolation media for:

Answer 3

Bacteroides, Peptostreptococcus, and Clostridium species

Question 4

The breakpoint of an antimicrobial drug refers to:

Answer 4

The optimal therapeutic level of drug that is achievable in serum

Question 5

Which class of antibiotics is used for the treatment of serious gram-negative infections as well as infection with Mycobacterium tuberculosis?

Answer 5

Aminoglycosides

Question 6

Several attendees of a medical conference in the Gulf coast area became ill after frequenting a seafood restaurant. A presumptive ID of Vibrio cholerae was made after a stool specimen grew out clear colonies on mac and yellow colonies on TCBS. Which key tests would eliminate Aeromonas and Pleisomonas species?

Answer 6

Mannitol fermentation and Na+ req

Question 7

Several attendees of a medical conference in the Gulf coast area became ill after frequenting a seafood restaurant. A presumptive ID of Vibrio cholerae was made after a stool specimen grew out clear colonies on mac and yellow colonies on TCBS. Which key tests would eliminate Aeromonas and Pleisomonas species?

Answer 7

Mannitol fermentation and Na+ requirement