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A fibrin clot formed in a test tube by the coagulase reaction. The tube test uses rabbit plasma that has been inoculated with a staphylococcal colony (i.e., Gram-positive cocci which are catalase positive). The tube is then incubated at 37 °C for 1.5 hours. If negative, then incubation is continued up to 18 hours.
Thrombodynamics test. Non-homogenous: realization of the three-dimensional model of the clot growth; Use of platelet free plasma; Record of information about the clot formation as a diagram, giving the possibility to calculate the key parameters of the blood coagulation system; New test, not widely accepted; Overall hemostatic potential (OHP)
In addition, pathogenic bacteria may secrete agents that alter the coagulation system, e.g. coagulase and streptokinase. [39] Immunohemostasis is the integration of immune activation into adaptive clot formation. Immunothrombosis is the pathological result of crosstalk between immunity, inflammation, and coagulation.
A thrombin generation assay (TGA) or thrombin generation test (TGT) is a global coagulation assay (GCA) and type of coagulation test which can be used to assess coagulation and thrombotic risk. [ 1 ] [ 2 ] [ 3 ] It is based on the potential of a plasma to generate thrombin over time, following activation of coagulation via addition of ...
A latex fixation test, also called a latex agglutination assay or test (LA assay or test), is an assay used clinically in the identification and typing of many important microorganisms. These tests use the patient's antigen - antibody immune response.
This phenomenon is the mechanism behind the CAMP test, [2] a test that was historically used for the identification of Streptococcus agalactiae and Listeria monocytogenes. [3] A modified version of this test called the reverse CAMP test, utilizing S. agalactiae instead of S. aureus , can also be used to identify Clostridium perfringens .
The principle behind this test is to use enzymes native to the organism to create a colored product in the presence of foreign molecules. The chemical 5-bromo-4-chloro-3-indolyl-beta-D-galactoside is used in the test because N. lactamica can hydrolyze it with the production of β- galactosidase , turning the solution into a blue color.
Staphylococcus schleiferi is a Gram-positive, cocci-shaped bacterium of the family Staphylococcaceae. [1] It is facultatively anaerobic, coagulase-variable, and can be readily cultured on blood agar where the bacterium tends to form opaque, non-pigmented colonies and beta (β) hemolysis. [2]