An excessive immune response that results from previous exposure to an antigen Immediate responses are antibody-mediated and occur in minutes; delayed responses are mediated by T-cells and occur about 24 hrs later
in many European texts called also "allergy" - immune-mediated tissue-damaging reaction In clinical language - any adverse immune reaction, which is too intensive or qualitatively unusual, because it brings pathological sequels The clinical usage of this term is not precise and somewhat misleading
Abnormally or excessively sensitive reaction to a stimulus Increased response that may be inappropriate to the level of stimulus
Being overreactive or oversensitive to sensory (or emotional) stimuli This is a very common feature of autistic spectrum condition and Sensory Integration Dysfunction (SID) See also: hyposensitivity
Typically refers to tooth pain that is caused very easily and with a stimulus that normally would elicit no feeling
Some individuals with ADHD report a heightened sensory awareness This is being highly sensitive to touch, smell and other sensory stimulus Can also be called Tactile Defensiveness
An exaggerated immune response to a foreign agent Some hypersensitivity reactions can be fatal
an allergy; an exaggerated or inappropriate immune response categorized based on which part of the immune system that is involved and the onset of response (i e Types I, II, III, IV)