IgA Deficiency. Print. IgA deficiency is a defect in the immune system characterized by an inadequate amount of the antibody class known as immunoglobulin A (IgA). Antibodies are large proteins produced by the body to fight infections caused by invaders, such as bacteria, viruses, fungi, parasites, and other foreign agents.
Definition of ultimo. : of or occurring in the month preceding the present.
Definition of ultimatum for Students plural ultimatums or ultimata \-ËmÄ-tÉ \ : a final condition or demand that if rejected could end future negotiations and lead to forceful or undesirable action