Mycobacterium marine fish infection

Mycobacterium murinum infection is a skin disease caused by the invasion of mycobacterium murinum from human skin when humans come into contact with seawater or fresh water. The pathogenesis is unclear. More common in children and young people, skin lesions occur in the elbow, knee, hands and feet, finger toe, ankle, calf and other limbs vulnerable to trauma, elbow skin lesions are the most common, accounting for about 70%. Partial injuries occurred within 3 to 4 weeks, mostly single red papules, slowly growing to form small red or purple nodules of 1 to 2 cm, and very few can be ulcerated to form superficial ulcers. Antituberculosis drugs are ineffective. Can usually subside within 2 to 3 years.