| Gell and Coombs Classification | A classification system that differentiates the 4 types of hypersensitivity reactions: Type I: anaphylactic reactions, Type II: cytotoxic reactions, Type III: immune complex reactions, and Type IV: cell-mediated reactions. (05 Mar 2000) |
|---|---|
| Gell, P | <person> British immunologist. See: Gell and Coombs reactions. (05 Mar 2000) |
| gellan lyase | <enzyme> Cleaves beta-d-glucosyl-1-4-beta-d-glucuronosyl sequence in gellan Registry number: EC 4.2.2.- Synonym: gellanase (26 Jun 1999) |
| Gelle test | A vibrating tuning fork is applied over the mastoid process; if it is heard, the air in the external auditory canal is compressed, by means of a rubber tube inserted into the canal and a hand bulb, thereby fixing the stapes in the oval window, and the sound ceases to be heard, but is again perceived if the air pressure is removed; a test of the mobility of the ossicles. (05 Mar 2000) |
| Gelle, Marie-Ernst | <person> French otologist, 1834-1923. See: Gelle test. (05 Mar 2000) |
| Gellerstedt, Nils | <person> *1896. See: Ceelen-Gellerstedt syndrome. (05 Mar 2000) |
| Gell and Coombs c. |
a classification of immune mechanisms of tissue injury, called by Gell and Coombs “allergic reactions,” comprising four types: type I, immediate hypersensitivity reactions, mediated by IgE antibody; type II, antibody-mediated hypersensitivity reactions, including complement-dependent lysis, antibody-dependent cell-mediated cytotoxicity (ADCC), and phagocytosis induced by opsonizing antibody; type III, immune complexmediated hypersensitivity reactions, including serum sickness, Arthus reactions, and systemic lupus erythematosus; and type IV, cell-mediated hypersensitivity reactions, mediated by sensitized T lymphocytes either by release of lymphokines or by T-cellmediated cytotoxicity, including contact dermatitis, allograft rejection, and graft-versus-host disease. Other authorities have added type V, antibody interference with the function of biologically active substances, including autoimmune diseases mediated by antireceptor antibodies and coagulation disorders mediated by antibodies to coagulation factors. The individual types IIV are described under hypersensitivity reaction, under reaction.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
|
|---|---|
| Gell and Coombs classification |
see under classification.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
|
| Gell | United States physicist noted for his studies of subatomic particles (born in 1929) |
|---|---|
| Gell | a type of dynamite in which the nitroglycerin is absorbed in a base of wood pulp and sodium or potassium nitrate |
Á¦Ç°¸í |
ÆÇ¸Å»ç |
º¸ÇèÄÚµå | ¼ººÐ/ÇÔ·® | ±¸ºÐ/º¸Çè±Þ¿© |
|---|