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Microbiology

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Rickettsia and Chlamydia

Question
34 out of 42
 

What diagnostic test is best to identify an infection with Chlamydia trachomatis?



A Aerobic and anaerobic blood cultures

B Stool culture

C DNA probe

D Urine culture

Ans. C DNA probe

a. The most specific test used to detect a chlamydial infection is a DNA probe or a PCR (NAAT-nucleic acid amplification tests).

b. Chlamydia trachomatis is a gram-negative obligate intracellular parasite, and any blood or urine culture would not be helpful for diagnosis. C. trachomatis is not present in stool.

c. Darkfield microscopy is used to view spirochetes, which C. trachomatis is not.

Rickettsia and Chlamydia Flashcard List

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