A30-A49: Other bacterial diseases

A31: Infection due to other mycobacteria

Infection due to other mycobacteria, as its name suggests, involves infection with varieties of mycobacteria other than the ones that cause tuberculosis and leprosy. These organisms are found naturally in the environment, particularly in water and soil, and can enter the human body in several ways, such as through inhalation, ingestion, or breaks in the skin. Once in the body, they can cause symptoms ranging from fever, weight loss, and fatigue to lung problems, skin lesions, and swollen lymph nodes, depending on the specific type of bacteria involved and the body's immune response. Disease progression is generally slow, but it can become chronic if untreated and can affect various systems in the body, including the respiratory, lymphatic, and integumentary (skin) systems.