What It Is. An IgA test measures the blood level of immunoglobulin A, one of the most common antibodies in the body. Antibodies are proteins made by the immune system to fight bacteria, viruses, and toxins. IgA is found in high concentrations in the body's mucous membranes, particularly the respiratory passages and gastrointestinal tract, as well as in saliva and tears. IgA also plays a role in allergic reactions.
The highest recorded closing of the Dow Jones Industrial Average, as of 2015, is 18,312.39, according to FedPrimeRate.com. The DJIA crossed the 18,000 mark for the first time in December, 2014, and reached its current record in May, 2015. Continue Reading.
It took the Dow, a stock gauge made up of 30 of Americaâs best-known blue-chip companies, just 64 calendar days to climb from 19,000 to 20,000, its second-fastest thousand-point sprint, according to S&P Dow Jones Indices. The climb from 10,000 to 11,000 back in 1999 took 35 days.