A disease is an abnormal condition affecting the body of an organism. It is often construed to be a medical condition associated with specific symptoms and signs.

Index of comprehensive articles on medical diseases and conditions. Covers all aspects of medicine produced by doctors.

disease /dis·ease/ (dĭ-zēz´) any deviation from or interruption of the normal structure or function of any body part, organ, or system that is manifested by a ...

Infectious diseases, also known as transmissible diseases or communicable diseases comprise clinically evident illness (i.e., characteristic medical signs and/or ...

Diseases and Conditions information from the Centers for Disease Control and Prevention.

Information on Lyme disease. Provided by the U.S. Centers for Disease Control and Prevention.

dis·ease (d-z z) n. 1. A pathological condition of a part, organ, or system of an organism resulting from various causes, such as infection, genetic defect, or ...

Parkinson's disease is a disorder of the brain that leads to shaking (tremors) and difficulty with walking, movement, and coordination.

Parkinson Disease. Parkinson disease is recognized as one of the most common neurologic disorders, affecting approximately 1% of individuals older than 60 ...

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