Diseases, rickettsial: The infectious diseases caused by the rickettsiae fall into 4 groups:(1) typhus: epidemic typhus, Brill-Zinsser disease, murine (endemic) typhus, and scrub typhus; (2) spotted fever-Rocky Mountain spotted fever, Eastern tick-borne rickettsioses, and rickettsialpox; (3) Q fever; and (4) trench fever.
Disinsection: Spraying aircraft for insects, a procedure called disinsection. Some countries in Africa, Latin America, the Caribbean, Australia and the South Pacific require the spraying of the aircraft passenger compartment with insecticide while passengers are present. This is done to prevent the importation of insects such as mosquitos. Disinsection procedures have been determined to be […]
- Dislocated shoulder
The shoulder joint is the most mobile joint in the body and allows the arm to move in many directions. This ability to move makes the joint inherently unstable and also makes the shoulder the most often dislocated joint in the body. Dislocations of the shoulder occur when the head of the humerus (upper arm […]
- Dislocation, congenital hip
Dislocation, congenital hip: The abnormal formation of the hip joint in which the ball at the top of the thighbone (the femoral head) is not stable within the socket (the acetabulum). The ligaments of the hip joint may also be loose and stretched. The degree of instability or looseness varies. A baby born with this […]
- Disorder, anxiety
A chronic condition characterized by an excessive and persistent sense of apprehension with physical symptoms such as sweating, palpitations, and feelings of stress. Anxiety disorders have biological and environmental causes. Anxiety disorders are very common, affecting one in 10 Americans.
- Disorder, attention deficit (ADD)
Disorder, attention deficit (ADD): An inability to control behavior due to difficulty in processing neural stimuli. In November, 1998 the National Institutes of Health (NIH) issued a consensus report developed by a panel of experts. The panel concluded that: Ritalin and other therapies may correct classroom behavior problems but there is no evidence that this […]