What is gingivitis Gingivitis is an inflammation of the gums (gingiva) caused by plaque and bacteria accumulation. Bacteria in plaque around your teeth release enzymes

What is Strep throat Strep throat is an infection of the throat caused by bacteria called Streptococcus pyogenes, also known as group A streptococcus. Most

What is smallpox Smallpox is a disease caused by the variola major virus (smallpox virus). Some experts say that over the centuries smallpox has killed

What is the plague Plague also called bubonic plague or black plague, is a disease that affects humans and other mammals. It is caused by

What is pinworm infection Pinworm infection is caused by a small, thin, white roundworm called Enterobius vermicularis. Pinworms are also called threadworms, enterobiasis and oxyuriasis. Pinworms

What is polycythemia vera Polycythemia vera is a rare condition characterized by an increased number of red blood cells in the bloodstream. Affected individuals may

What is spina bifida Spina bifida is a neural tube defect. The neural tube is that part of the very young fetus which later develops

What is dermatographia The term dermatographia sometimes also called dermographism, dermatographism or dermatographic urticaria, literally means writing on the skin. Dermatographia (dermographism) is an exaggerated wealing

Cavernous malformation brain Cerebral cavernous malformations are abnormal collections of small blood vessels (capillaries) in the brain and spinal cord that are enlarged and irregular in

What is mitral valve prolapse Mitral valve prolapse is a condition where the two valve flaps of the mitral valve do not close smoothly or