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.
Closing milestones of the Dow Jones Industrial Average. From Wikipedia, the free encyclopedia. This article is a summary of the closing milestones of the Dow Jones Industrial Average, a United States stock market index. Since first closing at 62.76 on February 16, 1885, the Dow Jones Industrial Average has increased, despite several periods of decline. 1 Milestone highs and lows.