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.
This is the period when the Dow Jones Industrial Average peaked at 381.10 in 1929 and fell to the astoundingly low level of 41.20, a decrease of 89.19% in a period less than three years. 1954 was the year when the Dow Jones Industrial Average finally went above the 381.10 level and never looked back.