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Blood Type A
Has A antigens and anti-B antibodies.
Blood Type B
Has B antigens and anti-A antibodies.
Blood Type AB
Has both A and B antigens, no anti-A or anti-B antibodies.
Blood Type O
Has neither A nor B antigens, but has anti-A and anti-B antibodies.
Rh Factor
Rh-positive has the D antigen; Rh-negative lacks it.
Acid Phosphatase Test
Presumptive semen test that detects elevated acid phosphatase activity.
Spermatozoa Examination
IMicroscopic examination for sperm cells in suspected semen evidence.
Prostate-Specific Antigen (PSA)
Protein commonly found in seminal fluid, used to help detect semen.
Blood and Semen Stain Preservation
Document, collect with clean tools, air-dry, and package biological evidence separately.