What is a common form of a skin infection caused by bacteria?

Folliculitis is a common form of skin infection caused by bacteria, particularly the Staphylococcus aureus bacterium. This condition occurs when hair follicles become inflamed, leading to small, red bumps or pus-filled blisters on the skin. It can result from factors such as shaving, wearing tight clothing, or exposure to bacteria in warm and moist environments, which makes it a prevalent issue.

While dermatitis refers to inflammation of the skin that can arise from various causes, including allergens or irritants, it is not specifically a bacterial infection but rather encompasses a broader range of conditions. Psoriasis is a chronic autoimmune condition characterized by rapid skin cell growth, resulting in thick, scaly patches, and is not caused by bacterial infection. Athlete's foot is a fungal infection typically affecting the feet, and while it involves pathogens, it is not caused by bacteria.

In summary, folliculitis stands out as a specific bacterial skin infection, making it the correct answer.