A typical bacterial infection on the nail plate can initially be identified by which color of spot?

• A. yellow-green
• B. white-gray
• C. blue-green
• D. orange-red

Answer: (A)

A typical bacterial infection on the nail plate can often be identified by the presence of a yellow-green spot. This discoloration is associated with certain bacterial species, such as Pseudomonas aeruginosa, which can thrive in moist environments, particularly under the nail. The yellow-green hue is a result of pigments produced by the bacteria, which can lead to a noticeable color change in the affected area.

This color change is an important indicator for identification and indicates that a bacterial infection may be present, prompting further investigation and appropriate treatment. In contrast, other colors like white-gray, blue-green, or orange-red do not specifically suggest bacterial infections of the nail plate and may relate to different issues or conditions, such as fungal infections or nail trauma.