Moderate

A darkfield microscope would be useful in examining blood for_______________?

Correct answer: A. Treponema

  • A. Treponema
  • B. Actinomyces
  • C. Streptococcus
  • D. Mycobacterium

Explanation

Treponema pallidum is a thin, motile spirochaete that is difficult to see with ordinary bright-field microscopy, so dark-field microscopy is used to visualize it. Actinomyces, Streptococcus, and Mycobacterium are generally examined by other staining or culture methods.

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