Page 79 - Review of Medical Microbiology and Immunology ( PDFDrive )
P. 79
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mebooksfree.com mebooksfree.com mebooksfree.com PRACTICE QUESTIONS: USMLE & mebooksfree.com mebooksfree.com
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68
PART I Basic Bacteriology
ANSWERS
3. A sputum culture will be rejected (i.e., it will not be stained or
cultured) by the clinical laboratory if:
1. (D)
(A) it is streaked with blood.
2. (E)
(B) it contains IgA antibody.
3. (C)
(C) it contains many more epithelial cells than neutrophils.
4. (B)
(D) it contains pus.
(E) it contains sulfur granules.
4. The identification of Salmonella and Shigella in stool cultures
using Eosin–Methylene Blue (EMB) media is dependent on which
one of the following properties? COURSE EXAMINATIONS
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mebooksfree.com mebooksfree.com mebooksfree.com Board) Practice Questions starting on page 709. Also see Part mebooksfree.com
(A) Salmonella and Shigella produce a blue colony in the presence
Questions on the topics discussed in this chapter can be found
of methylene blue.
in the Basic Bacteriology section of Part XIII: USMLE (National
(B) Salmonella and Shigella produce a colorless colony because
they do not ferment lactose.
XIV: USMLE (National Board) Practice Examination starting
(C) Salmonella and Shigella produce a green colony because they
on page 751.
utilize the bile in the media.
(D) Salmonella and Shigella produce a red colony in the presence of
eosin.
(E) Salmonella and Shigella produce a yellow colony because they
ferment glucose.
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