| DIF | diffuse interstitial fibrosis; direct immunofluorescence; dose increase factor |
|---|---|
| DAT | delayed-action tablet; dementia Alzheimer's type; dental aptitude test; diacetylthiamine; diet as to... |
| DC | daily census; data communication; data conversion; decrease; deep compartment; Dental Corps; deoxych... |
| ACIF | anticomplement immunofluorescence |
| CLIF | cloning inhibitory factor; Crithidia luciliae immunofluorescence |
| DIF | Direct Immunofluorescence |
|---|---|
| DFA | Direct immunofluorescence assay |
| ACIF | Anticomplement immunofluorescence |
| IF | Immunofluorescence |
| IFA | Immunofluorescence |
| anticomplement immunofluorescence | A technique used to make certain indirect fluorescent antibody techniques more specific and sensitive. Here the fluorescent dye is conjugated to antibody directed at complement and then added to a complement-fixing complex of antigen and patient antibody. (05 Mar 2000) |
|---|---|
| avidin-biotin immunofluorescence | Holds promise for more sensitive and specific amplification of indirect fluorescent antibody procedures. Antibody to the patient's specific antibodies is labelled with biotin, a compound capable of specifically binding avidin in high concentrations. Fluorescent labelled avidin is then added and fluorescent microscopy is used to detect the presence of the complexes. (05 Mar 2000) |
| micro-immunofluorescence | Several different substrates are arranged in specific locations on a single microscope slide well allowing a rapid, simultaneous indirect fluorescent antibody on each substrate. (05 Mar 2000) |
| immunofluorescence | <technique> A test or technique in which one or other component of an immunological reaction is made fluorescent by coupling with a fluorochrome such as fluorescein, phycoerythrin or rhodamine so that the occurrence of the reaction can be detected as a fluorescing antigen-antibody complex. Used in microscopy to localise small amounts of antigen or specific antibody. (18 Nov 1997) |
| immunofluorescence method | Any method in which a fluorescent-labelled antibody is used to detect the presence or determine the location of the corresponding antigen. (05 Mar 2000) |
| indirect immunofluorescence | <procedure> A method of immunofluorescence staining in which the first antibody, that is directed against the antigen to be localised, is used unlabelled and the location of the first antibody is then detected by use of a fluorescently labelled antiIgG (against IgGs of the species in which the first antibody was raised). The advantage is that there is some amplification and a well characterised goat antirabbit IgG antibody can, for example: be used against a scarce specific antibody raised in rabbits. The same technique can be used for ultrastructural localisation of the first antibody by substituting peroxidase or gold labelled second antibody. (18 Nov 1997) |
| non-direct transmission | <epidemiology> A mode of transmission that differs in some mysterious way from indirect transmission. (05 Dec 1998) |
| direct | 1. Straight, in a straight line. 2. Performed immediately and without the intervention of subsidiary means. Origin: L. Directus (18 Nov 1997) |
| direct acrylic restoration | A direct resin restoration of autopolymerizing acrylic. (05 Mar 2000) |
| direct agglutination | A general term for techniques which use the agglutination (macroscopic clumping) of particulate reagents as an indicator of the presence of an antigen-antibody reaction. Examples (haemagglutination, latex agglutination and coagglutination) follow. (05 Mar 2000) |
| direct B-cell | Lymphocytes responding to a small range of antigens by antibody production without any requirement for T-cells. The antigens include flagellin and pokeweed mitogen. (18 Nov 1997) |
| direct bilirubin | Conjugated bilirubin = Direct bilirubin. Bilirubin that has been chemically attached to a glucuronide in the liver. The bilirubin that is excreted into the bile by the liver and stored in the gallbladder or transferred to the duodenum. Normal direct bilirubin is 0 to 0.3 mg/dl. Greater than normal values can be seen in bile duct obstruction, cirrhosis, Crigler-Najjar syndrome, Dubin-Johnson syndrome and hepatitis. (27 Sep 1997) |
| direct bone impression | An impression of denuded bone, used in the construction of subperiosteal denture implants. (05 Mar 2000) |
| direct composite resin restoration | A direct restoration made by inserting a plastic mix of auto or light-polymerised resins in a cavity prepared in a tooth. Synonym: direct composite resin restoration. (05 Mar 2000) |
| direct contamination | <dentistry> Direct contact with impurities or germs. (for example by a patient sneezing on the assistant.) (08 Jan 1998) |
| direct immunofluorescence test |
Direct fluorescent antibody.
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