Presumptive Blood Test
Definition
A screening reaction compatible with blood but subject to alternative causes. Substrates and other catalysts can also affect the response. A positive reaction is not specific proof of human blood or a particular donor.
- Context
- Blood screening
For example, a screening response can identify an area for further examination without establishing that the material is human blood.
Suitable follow-up and contamination controls are required.
Related terms
- Cell-Free DNA
- DNA outside intact cells, including fragments in plasma. Collection and processing can change the proportions represented in an extract. The presence of...
- Donor Proposition
- A stated explanation about whose DNA contributed, distinct from how it arrived. A contributor proposition concerns whose genetic material is represented. It...
- Leukocyte
- A leukocyte is a white blood cell involved in immune functions and ordinarily containing a nucleus in humans. Leukocytes can contribute nuclear...
- Plasma
- The liquid fraction of blood (approximately 55% by volume), containing water, proteins (albumin, immunoglobulins, fibrinogen, clotting factors), electrolytes, glucose, hormones, and dissolved...