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.

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 ...

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

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 ...

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