What bacteria is often associated with rapid infection and nail discoloration?

Pseudomonas aeruginosa is well-known for its role in causing rapid infections, particularly in moist environments. This bacterium can lead to a condition commonly referred to as "green nail syndrome," characterized by nail discoloration, usually a greenish hue. The presence of Pseudomonas is particularly concerning in nail salons, as it thrives in wet conditions and can infect nails that are compromised or damaged.

This organism can penetrate through small breaks in the skin or nail, resulting in infection and potentially serious complications if left untreated. Onycholysis, or the separation of the nail from the nail bed, can also occur, allowing this bacterium to invade more effectively. The swift onset of symptoms associated with infections from Pseudomonas aeruginosa makes it a notable concern in any setting where nail care occurs.

Other bacteria mentioned have different associations and modes of infection. For instance, Escherichia coli primarily affects the gastrointestinal tract, Staphylococcus aureus can lead to infections but is not commonly linked to nail discoloration in the same rapid fashion, and Salmonella is associated primarily with foodborne illnesses rather than skin or nail infections. Thus, Pseudomonas aeruginosa stands out as the correct answer in this context