Share +. Text A A A. Rheumatoid arthritis (RA) is an autoimmune disease where the body's immune system attacks normal joint tissues, causing inflammation of the joint lining. This inflammation of the joint lining (called the synovium) can cause pain, stiffness, swelling, warmth, and redness.ext A A A. Rheumatoid arthritis (RA) is an autoimmune disease where the body's immune system attacks normal joint tissues, causing inflammation of the joint lining.
Tuberculosis. Tuberculosis (TB) is an infectious disease caused by a bacterium that usually attacks the lungs. TB is spread through the air from one person to another. The bacteria are put into the air when a person with active TB disease of the lungs or throat coughs, sneezes, speaks, or sings.
Yes, TB is contagious and can be transmitted from person to person, mainly when a person with TB coughs, sneezes, speaks, or even sings (airborne transmission).Other people who breathe in the aerosolized bacteria can become infected.uberculosis (TB) is a disease caused by a bacterium named Mycobacterium tuberculosis that usually infects the lungs, but in some individuals, the bacteria can attack any part of the body. Before treatments were effective against TB, it was the leading cause of death in the United States.