This results in a change in immunological tolerance and the subsequent activation of abacavir-specific cytotoxic T cells, which produce a systemic reaction known as abacavir hypersensitivity syndrome.
Chronic human exposure via humidifiers or air conditioners can lead to hypersensitivity pneumonitis (extrinsic allergic alveolitis) or "humidifier lung".
IgE is known to be elevated in various autoimmune disorders such as Lupus(SLE), Rheumatoid Arthritis(RA) & psoriasis, and is theorized to be of pathogenetic importance in RA and SLE by eliciting a hypersensitivity reaction.
The sign is named after American physician John Benjamin Murphy (1857–1916), a prominent Chicago surgeon from the 1880s through the early 1900s, who first described the hypersensitivity to deep palpation in the subcostal area when a patient with gallbladder disease takes a deep breath.
Pauci-immune (pauci- Latin: few, little) is a general term used to refer to a form of vasculitis that is associated with minimal evidence of hypersensitivity upon immunofluorescence and a lack of Anti-glomerular basement membrane antibody.
The Shwartzman phenomenon is named for Gregory Shwartzman, the doctor at Mount Sinai Hospital in New York City who was the first to develop the concept of immune system hypersensitivity in the 1920s.
Clemens von Pirquet, an Austrian physician, discovered that patients who had previously received injections of horse serum or smallpox vaccine had quicker, more severe reactions to a second injection, and he coined the word allergy to describe this hypersensitivity reaction.