micro25 - nishi

[ArchivalUser]

C. diphtheriae may be difficult to isolate from the nasopharynx without the use of special media. Which of the following is the medium of choice?
A. Sheep blood agar
B. Löffler's medium
C. Thayer-Martin agar
D. Thiosulfate citrate bile salts sucrose medium
E. Löwenstein-Jensen medium

[ArchivalUser]

b??

[ArchivalUser]

ccc

[ArchivalUser]

B,

[ArchivalUser]

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[ArchivalUser]

The answer is: B

Löffler's medium, which is very rich, supports the growth of C. diphtheriae but suppresses the growth of most other nasopharyngeal microflora. C. diphtheriae colonies on this medium appear small, gray, and granular and have uneven edges.