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.
The Dow Jones industrial average tops 25,000 for first time, continuing its history-making rise By Renae Merle By Renae Merle Email the author January 4 Email the author Follow @renaemerle Trader Peter Tuchman on the floor of the New York Stock Exchange shortly after the opening bell in New York on Thursday.