Alloimmunity
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(Redirected from Alloimmunization)
Alloimmunity is a condition in which the body gains immunity, from another individual of the same species, against its own cells. Alloimmunity should not be confused with autoimmunity in which the body's immune system attacks its own cells without being provoked or influenced by substances or cells from another member of the same species.
If either alloimmunity or autoimmunity is directed against red blood cells (RBCs), the direct Coombs test is positive.
Alloimmunity can occur
- in the recipient after transfusions of fluids such as blood or plasma.
- in the recipient after allografts (grafts).
- in the fetus after maternal antibodies have passed through the placenta into the fetus, as in haemolytic disease of the newborn and fetomaternal alloimmune thrombocytopenia.
Transfusion medicine | |
|---|---|
| General concepts | Apheresis (Plasmapheresis, Plateletpheresis, Leukapheresis) - Blood transfusion - Coombs test - Cross-matching - Exchange transfusion - International Society of Blood Transfusion - Intraoperative blood salvage - ISBT 128 - Transfusion reactions |
| Human blood group systems - Blood type | ABO - Chido-Rodgers - Colton - Cromer - Diego - Dombrock - Duffy - Gerbich - GIL - Hh - Ii - Indian - JMH - Kell (Xk) - Kidd - Knops - LW - Lewis - Lutheran - MNS - OK - P - Raph - Rh - Scianna - T-Tn - Xg - Yt - Other |
| Blood products | Blood donation - Blood substitutes - Cryoprecipitate - Platelets - Plasma - Red blood cells - Whole blood |
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