| lymphocyte lymphocyte | A type of non-granular antibodies. (09 Oct 1997) |
|---|---|
| bacterial typing techniques | Procedures for identifying types and strains of bacteria. The most frequently employed typing systems are bacteriophage typing and serotyping as well as bacteriocin typing and biotyping. (12 Dec 1998) |
| bacteriophage typing | A technique of bacterial typing which differentiates between bacteria or strains of bacteria by their susceptibility to one or more bacteriophages. (12 Dec 1998) |
| phage typing | <microbiology> Bacteria may be typed by their susceptibility to a range of bacteriophages though confusion may arise if the bacteria carry plasmids encoding restriction endonucleases. (18 Nov 1997) |
| mycological typing techniques | Procedures for identifying types and strains of fungi. (12 Dec 1998) |
| HLA typing | <immunology> Tests done in order to determine if a patient has antibodies against a potential donor's HLA antigens. The presence of antibodies means that a particular graft will be rapidly rejected. (05 Mar 2000) |
| DNA typing | <molecular biology> See restriction fragment length polymorphism. (18 Nov 1997) |
| tissue typing | <procedure> The process of determining the allelic types of the antigens of the major histocompatibility complex (MHC) that determine whether a tissue graft will be accepted or rejected. at present carried out either by use of polyclonal or monoclonal antibodies against MHC antigens or less usually by tests of MHC restricted cell function or skin grafting (the latter not in humans). (18 Nov 1997) |
| typing | Classification according to type. Origin: see type Bacteriophage typing, a microbiological procedure, of epidemiological importance, for distinguishing types within a seemingly homogeneous bacterial species or strain by the use of type-specific bacteriophage. HLA typing, tests done in order to determine if a patient has antibodies against a potential donor's HLA antigens. The presence of antibodies means that a particular graft will be rapidly rejected. Also used to establish paternity and in forensic medicine. (05 Mar 2000) |
| antigens, differentiation, b-lymphocyte | Membrane antigens associated with maturation stages of B-lymphocytes, often expressed in tumours of B-cell origin. (12 Dec 1998) |
| antigens, differentiation, t-lymphocyte | Antigens expressed on the cell membrane of T-lymphocytes during differentiation, activation, and normal and neoplastic transformation. Their phenotypic characterization is important in differential diagnosis and studies of thymic ontogeny and T-cell function. (12 Dec 1998) |
| bare lymphocyte syndrome | <syndrome> Absence of HLA antigens on peripheral mononuclear cells, which may result in immunodeficiency. (05 Mar 2000) |
| B lymphocyte | <haematology, immunology> An immunologically important lymphocyte, produced by the bone marrow, that is responsible for the production of immunoglobulins, it is the precursor of the plasma cell. The surface markers can be used to detect and differentiate chronic lymphocytic leukaemia from acute lymphocytic leukaemia. (13 Nov 1997) |
| b-lymphocyte subsets | A classification of B-lymphocytes based on structurally or functionally different populations of cells. (12 Dec 1998) |
| gene rearrangement, b-lymphocyte | Ordered rearrangement of b-lymphocyte variable gene regions coding for the immunoglobulin chains, thereby contributing to antibody diversity. It occurs during the differentiation of the immature b-lymphocyte. (12 Dec 1998) |