What type of nail discoloration is typically associated with a bacterial infection?

• A. Green discoloration from mold
• B. Yellow discoloration from nail polish
• C. Discoloration of nail plate from bacteria
• D. Red discoloration from trauma

Answer: (C)

The correct answer refers to the discoloration of the nail plate specifically caused by bacteria, which is often a result of an infection. Bacterial infections can lead to a range of nail issues, with one of the most common signs being a greenish or even black discoloration. This occurs due to the presence of specific bacteria, often referred to as Pseudomonas aeruginosa, which thrive in moist environments. The discoloration is not merely surface-level but indicates an underlying infection that may require appropriate treatment.

The other options describe discolorations that have different causes. Green discoloration from mold refers to fungal infections rather than bacteria. Yellow discoloration due to nail polish speaks to cosmetic changes that do not involve infectious agents. Lastly, red discoloration from trauma is related to physical injury to the nail, rather than an infection process. Understanding these distinctions is crucial in identifying the correct cause of nail discoloration and guiding appropriate treatment.