Fortified foods contain vitamin D in the form of either D2 or, more commonly, D3, which is the type produced by human skin exposed to sunlight. Salmon, tuna, swordfish and mackerel are examples of fish whose flesh contains vitamin D, notes the NIH Office of Dietary Supplements.
Definition of Wassermann test. : a test for the detection of syphilis using the Wassermann reaction âcalled also Wassermann.
What is Titer Testing? A titer test (pronounced TIGHT er) is a laboratory test measuring the existence and level of antibodies to disease in blood. Antibodies are produced when an antigen (like a virus or bacteria) provokes a response from the immune system. This response can come from natural exposure or from vaccination.