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.
Free Prostate Specific Antigen Measurement
The determination of the amount of free prostate specific antigen in a biological sample.
T-Lymphocyte Subpopulation to T-Lymphocyte Subpopulation Ratio Measurement
The determination of a sub-population of T-lymphocytes to a sub-population of T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Medium- to Long-Chain Acylcarnitine Ratio Measurement
The determination of the ratio of medium-chain acylcarnitines (acyl groups with 6 to 12 carbon atoms) to long-chain acylcarnitines (acyl groups with 13 to 20 carbon atoms) present in a sample. The measurement may be expressed as a ratio or percentage.
Acanthocyte to Erythrocyte Ratio Measurement
The determination of the ratio of acanthocytes compared to erythrocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Dendritic Cell to Leukocyte Ratio Measurement
The determination of the ratio of dendritic cells to leukocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Blastomyces Serologic Test
A test designed to detect the presence of Blastomyces antibodies in serum.
Invariant Natural Killer T-Lymphocyte Subpopulation to Invariant Natural Killer T-Lymphocyte Subpopulation Ratio Measurement
The determination of the ratio of a sub-population of invariant natural killer T-lymphocytes to a sub-population of invariant natural killer T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Human Papillomavirus Type 74 Measurement
The determination of the amount of Human papillomavirus type 74 in a sample.
HIV-1/2 RNA Measurement
The determination of the amount of HIV-1/2 RNA present in a sample.
TNF Superfamily Member 12 Measurement
The determination of the amount of total tumor necrosis factor superfamily member 12 present in a sample.
Hepatitis B Virus e Antigen Measurement
The determination of the amount of Hepatitis B virus e antigen present in a sample.
Neutrophils to Non-Squamous Epithelial Cells Ratio Measurement
The determination of the ratio of neutrophils compared to non-squamous epithelial cells present in a sample. The measurement may be expressed as a ratio or percentage.
Urea to Creatinine Ratio Measurement
The determination of the ratio of urea to creatinine present in a sample. The measurement may be expressed as a ratio or percentage.
Granulocyte Count
The determination of the amount of granulocytes present in a sample.
Rh Factor Measurement
An immunology test to measure for the presence of the Rh factor antigen in blood.
Epstein-Barr Virus Viral Load Measurement
The determination of the amount of Epstein-Barr virus viral load present in a sample.
Dengue Virus 4 RNA Measurement
The determination of the amount of dengue virus 4 RNA present in a sample.
Free Metanephrine Measurement
The determination of the amount of free metanephrine present in a sample.
Aspartate Aminotransferase Isoenzyme C Measurement
The determination of the amount of aspartate aminotransferase isoenzyme C present in a sample.
Urea Nitrogen to Creatinine Ratio Measurement
The determination of the ratio of urea-nitrogen to creatinine present in a sample. The measurement may be expressed as a ratio or percentage.
SARS-related Coronavirus RNA Measurement
The determination of the amount of SARS-related coronavirus RNA (including but not limited to SARS-CoV, SARS-CoV-2, and/or other SARS-like Coronavirus) in a biological sample.
Non-class-switched IgG-positive Memory B-Lymphocyte Count
The determination of the amount of memory non-class switched IgG-positive B-lymphocytes present in a sample.
Heparin Measurement
The determination of the amount of heparin present in a sample.
7-alpha-Hydroxy-4-cholesten-3-one Measurement
The determination of the amount of 7-alpha-hydroxy-4-cholesten-3-one in a sample.