Dandy fever: An acute mosquito- borne viral illness of sudden onset that usually follows a benign course with headache, fever, prostration, severe joint and muscle pain, swollen glands (lymphadenopathy) and rash. The presence (the “dengue triad”) of fever, rash, and headache (and other pains) is particularly characteristic. Better known as dengue, the disease is endemic throughout the tropics and subtropics. It goes by other names including breakbone fever. Victims of dengue often have contortions due to the intense joint and muscle pain. Hence, the name “breakbone fever.” Slaves in the West Indies who contracted dengue were said to have “dandy fever” because of their postures and gait.
- Danlos syndrome
Danlos syndrome: Better known as Ehlers-Danlos syndrome (EDS), is an inherited disorder with easy bruising, joint hypermobility (loose joints), skin laxity, and weakness of tissues. There are a number of different Ehlers-Danlos syndromes which share these features but can be categorized into nine different types. Type I EDS (the “gravis” form od EDS) is characterized […]
- Danon disease
Danon disease: A genetic disorder characterized by heart problems, mental retardation and muscle weakness. Changes in the retina of the eye, leading to visual disturbances, may be present. Males are more severely affected and show symptoms in childhood or early adolescence, while affected females usually develop the symptoms later, in adolescence or adulthood. The disease […]
- Darier disease
Darier disease: A genetic skin disease characterized by an abnormality of the horny layer of the skin around the hair follicles. This disorder is inherited in an autosomal dominant manner and is due to mutation in a gene called ATP2A2 on chromosome 12. Also known as keratosis follicularis.
- Dark adaptometry
Dark adaptometry: A type of electrophysiologic retinal testing done to diagnose and manage retinal degeneration by measuring the length of time it takes for the retina to regain maximal sensitivity to low amounts of light after it has been exposed to bright light then returned to darkness.
- Darwin, Charles
Darwin, Charles: English naturalist (1809-82), considered the father of evolution. Darwin voyaged aboard the Beagle to see the wonders of South America. After his return to England, he proposed a mechanism for evolution — natural selection. Darwin noted that successful species produce more offspring in each generation than are needed to replace the adults who […]