Tuberculosis (TB) is a bacterial infection primarily caused by Mycobacterium tuberculosis , affecting various parts of the body. It can be classified into several types based on the site of infection and the stage of the disease. Types of Tuberculosis 1. Based on Site of Infection Pulmonary Tuberculosis : This is the most common type, affecting the lungs. Symptoms include a persistent cough, chest pain, fever, and weight loss. Pulmonary TB can be infectious, especially when active. Extrapulmonary Tuberculosis : This type occurs when TB spreads beyond the lungs to other parts of the body. It includes various forms: Lymphadenitis : Affects lymph nodes, causing swollen and painful lumps. Skeletal TB : Involves the bones, particularly the spine and long bones. Genitourinary TB : Affects the urinary tract and reproductive organs, potentially leading to infertility in women Miliary TB : A severe form where TB bacteria spread through the bloodstream to multiple organs, often seen in chi...