| blood group incompatibility | A mismatch between donor and recipient blood. Antibodies present in the recipient's serum are directed against antigens in the donor product. Such a mismatch may result in a transfusion reaction in which, for example, donor blood is haemolyzed. (12 Dec 1998) |
|---|---|
| ABO incompatibility | <haematology> A type of blood incompatibility, found rarely. Transfusion reactions may occur as a result of such incompatibility. (27 Sep 1997) |
| rhesus incompatibility | <haematology> A blood incompatibility between the mother and her baby. During childbirth if the mother is Rh negative and the baby is Rh positive, blood can enter the maternal circulation (from the baby) sensitising the mother against Rh factor. The mother's immune system will produce antibodies to Rh factor. In subsequent pregnancies, these maternal Rh antibodies can mix into the foetal circulation during childbirth. This will cause the rupture (haemolytic anaemia) of the baby's red blood cells. See: newborn jaundice. (27 Sep 1997) |
| physiologic incompatibility | A form of incompatibility in which the substances in a mixture exert opposing physiologic actions. Synonym: therapeutic incompatibility. (05 Mar 2000) |
| self incompatibility | <plant biology> Inability of pollen grains to fertilize flowers of the same plant or its close relatives. Acts as a mechanism to ensure out breeding within some plant species, for example in the case of the S gene complex in Brassicas. (18 Nov 1997) |
| drug incompatibility | <pharmacology> The quality of not being miscible with another given substance without a chemical change. One drug is not of suitable composition to be combined or mixed with another agent or substance. The incompatibility usually results in an undesirable reaction, including chemical alteration or destruction. (12 Dec 1998) |
| incompatibility | The quality of being incompatible. (05 Mar 2000) |
| therapeutic incompatibility | A form of incompatibility in which the substances in a mixture exert opposing physiologic actions. Synonym: therapeutic incompatibility. (05 Mar 2000) |
| ABO blood group | <haematology> The major human blood type system which describes the oligosaccharide glycoprotein antigens found on the surface of human blood cells. According to the type of antigen present, a person may be assigned a blood type of A, B, AB or O. A second type of antigen, the Rh factor, renders a positive or negative blood type. The ABO blood group system is important because it determines who can donate blood to or accept blood from whom. Type A or AB blood will cause an immune reaction in people with type B blood and type B and AB blood will cause a reaction in people with type A blood. Conversely, type O blood has no A or B antigens, so people with type O blood are universal donors. And since AB blood already produces both antigens, people who are type AB can accept any of the other blood types without suffering an immune reaction. (04 Jul 1999) |
| actinobacteria group | A group of gram-positive, heterogeneous bacteria. This group encompasses a range of morphologically, physiologically, and chemically different organisms and includes bacteria that form cocci, short rods, irregular rods, and mycelia that fragment. (12 Dec 1998) |
| alkyl group | <chemistry> A funtional group on an organic molecule which is derived from an alkane which has lost a hydrogen atom. (13 Nov 1997) |
| aluminum group | Aluminum, boron, gallium, indium, and thallium. (05 Mar 2000) |
| amino group | <biochemistry> An -NH2 group. Organic compounds which have this group are called amines. (09 Oct 1997) |
| anterior group of axillary lymph nodes | Lymph nodes located along the lateral thoracic vein; they receive the drainage of the pectoral region, including most of the drainage of the breast. Synonym: nodi lymphatici axillaris pectorales, anterior group of axillary lymph nodes. (05 Mar 2000) |
| apical group of axillary lymph nodes | The group of lymph node's located at the apex of the axillary fossa that receive lymphatic drainage from other groups of axillary node's and then drain in turn into the subclavian lymphatic trunk. Synonym: nodi lymphatici axillares apicales. (05 Mar 2000) |