Anticardiolipin Antibodies Test ( ACA )
The Anticardiolipin Antibodies Test, or ACA Blood Test, aids in the diagnosis of antiphospholipid syndrome (APS). APS is an autoimmune disorder that produces anticardiolipin antibodies. These antibodies interfere with the blood clotting process, which can result in inappropriate or excessive clotting.
Antidiuretic hormone (ADH)
Antineutrophil cytoplasmic antibodies (ANCA)
Antisperm antibody test (ASAB)
An antisperm antibody test looks for special proteins (antibodies) that fight against a man's sperm in blood, vaginal fluids, or semen. The test uses a sample of sperm and adds a substance that binds only to affected sperm. Semen can cause an immune system response in either the man's or woman's body.
Antistreptolysin O (ASO) / (ASLO)
Antithyroid microsomal / Thyroid peroxidase antibody (AMA)
Apolipoprotein A1 (ApoA1)
Arsenic
Arsenic is not likely to be detected in blood specimens drawn more than 2 days after exposure because it has become integrated into nonvascular tissues. Consequently, blood is not a good specimen to screen for arsenic, although periodic blood levels can be determined to follow the effectiveness of therapy.