The best way to directly observe Treponema pallidum is through ______ microscopy.

Question

Quizplus · Accepted Answer

Dark-field microscopy is specifically designed for observing living, unstained specimens that are difficult to see with other types of microscopy. The technique illuminates the specimen with a cone-shaped beam of light from the side. This causes the specimen to scatter light in all directions except for directly back into the objective lens, resulting in a dark background with brightly illuminated specimen. This makes it an ideal choice for observing Treponema pallidum which is a thin, twisting bacterium that cannot be seen with bright-field microscopy.

The Best Way to Directly Observe Treponema Pallidum Is Through