Final answer:
Gram-negative folliculitis appears as itchy, red, and pus-filled bumps, caused by bacteria like Pseudomonas aeruginosa. Diagnosis is usually based on skin inspection, and treatment often includes topical antibiotics. Prevention involves avoiding tight clothing and skin irritation.
Step-by-step explanation:
Gram-negative folliculitis is a skin condition characterized by the inflammation of hair follicles, which can present as itchy, red, pus-filled bumps. The causative bacteria, such as Pseudomonas aeruginosa, are capable of thriving in moist environments such as hot tubs, leading to what's known as hot tub folliculitis. This condition is different from infections caused by Propionibacterium acnes, a gram-positive bacteria associated with acne.
Common factors such as sweat, skin injuries, ingrown hairs, and shaving irritation can all contribute to the development of folliculitis. To diagnose folliculitis, a skin inspection is typically performed, and treatment often begins with topical antibiotics without the need for culturing the bacteria. For prevention, avoiding tight clothing and reducing skin irritation are beneficial practices. Severe or persistent cases might require additional medical treatment.