allergen. 1. a substance, protein or nonprotein, capable of inducing allergy or specific hypersensitivity. 2. a purified protein of a food (such as milk, eggs, or wheat), bacterium, or pollen. adj., adj allergenÂ´ic. Allergens are used to test a patient for hypersensitivity to specific substances (see skin test).. an extract of any substance known to cause allergy. Allergens are used to test a patient for hypersensitivity to specific substances (see skin test). They are also used to densensitize or hyposensitize allergic individuals. See immunotherapy. Almost any substance in the environment can be an allergen.
The prognosis of Kidney stones may include the duration of Kidney stones, chances of complications of Kidney stones, probable outcomes, prospects for recovery, recovery period for Kidney stones, survival rates, death rates, and other outcome possibilities in the overall prognosis of Kidney stones.
Topic Overview. Kidney failure occurs when the kidneys lose their ability to function. To treat kidney failure effectively, it is important to know whether kidney disease has developed suddenly (acute) or over the long term (chronic). Symptoms may reflect the actual cause of the kidney problem. 2  An obstruction in the urinary tract may cause pain in the side or lower back (flank pain), blood in the urine, or reduced urine output. 3  Dehydration may cause extreme thirst; lightheadedness or faintness; a weak, rapid pulse; and other symptoms.