Testing Knowledge
Test Directory
Source-backed test guides: what each test is for, how it is performed, its limitations, and which reviewed products serve it. Personal health questions are answered with knowledge and preparation guidance — not supplier sales.
Viable Cell to Total Cell Ratio Measurement
The determination of the ratio of viable cells to total cells present in a sample. The measurement may be expressed as a ratio or percentage.
Pyrovalerone Measurement
The determination of the amount of the pyrovalerone in a sample.
Gamma Globulin Measurement
The determination of the amount of gamma globulin present in a sample.
Gut-Homing Cytotoxic Central Memory T-Lymphocyte Subpopulation to Gut-Homing Cytotoxic Central Memory T-Lymphocyte Ratio Measurement
The determination of the ratio of a sub-population of gut-homing cytotoxic central memory T-lymphocytes to total gut-homing cytotoxic central memory T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
EUROIMMUN Anti-SARS-CoV-2 ELISA IgA Serology Assay
A proprietary enzyme-linked immunosorbent assay for semi-quantitative detection of IgA antibodies against SARS-CoV-2 using the S1 domain of the spike protein.
Guanylate Binding Protein 1 Measurement
The determination of the amount of guanylate binding protein 1 present in a sample.
Lactate Dehydrogenase Isoenzyme 3 Measurement
The determination of the lactate dehydrogenase isoenzyme 3 present in a sample.
Naphyrone Measurement
The determination of the amount of the naphyrone in a sample.
Mycobacterium tuberculosis IgA Antibody Measurement
The determination of the amount of Mycobacterium tuberculosis IgA antibody present in a sample.
Dendritic Cell Subpopulation Count
The determination of the number of a sub-population of dendritic cells in a sample.
Lymphocytes to Non-Squamous Epithelial Cells Ratio Measurement
The determination of the ratio of lymphocytes compared to non-squamous epithelial cells present in a sample. The measurement may be expressed as a ratio or percentage.
Complement C5a Measurement
The determination of the amount of complement C5a present in a sample.
Complement C1q Antibody Measurement
The determination of the amount of complement C1q antibody present in a sample.
Alanine Measurement
The determination of the amount of alanine present in a sample.
Basophilic Erythroblast Count
The determination of the amount of basophilic erythroblasts present in a sample from an experimental organism.
Hepatitis C Virus Antigen Measurement
The determination of the amount of hepatitis C virus antigen present in a sample.
Potassium to Creatinine Ratio Measurement
The determination of the ratio of potassium compared to creatinine present in a sample. The measurement may be expressed as a ratio or percentage.
Amylase Measurement
A quantitative measurement of amylase present in a sample.
Pathologic Cast Measurement
The determination of the amount of pathologic (non-hyaline) casts present in a sample.
Terminal Memory Helper T-Lymphocyte Subpopulation Count
The determination of the number of a subpopulation of helper terminal memory T-lymphocytes in a sample.
Phosphorylated Tau 217 to Amyloid Beta 1-42 Ratio Measurement
The determination of the ratio of phosphorylated Tau 217 to amyloid beta 1-42 present in a sample. The measurement may be expressed as a ratio or percentage.
Mycoplasma Measurement
The determination of the amount of Mycoplasma genus level organisms in a sample.
Hemoglobin Distribution Width Measurement
A quantitative measurement of the distribution of the hemoglobin concentration in red blood cells.
Soluble Lymphocyte Activation Gene-3 Measurement
The determination of the amount of soluble lymphocyte activation gene-3 in a sample.