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.

Hyocholate Measurement
The determination of the amount of hyocholate in a sample.
NNAL-N-Gluc Measurement
The determination of the amount of NNAL-N-gluc in a sample.
HDL-Cholesterol Subclass 3 Measurement
The determination of the amount of HDL-cholesterol subclass 3 present in a sample.
B-Lymphocyte to Non-TNK Leukocyte Ratio Measurement
The determination of the ratio of B-lymphocytes to leukocytes that are not T cells or natural killer cells present in a sample. The measurement may be expressed as a ratio or percentage.
Homocysteine Acid Measurement
The determination of the amount of homocysteine amino acid present in a sample.
SP100 Antibody Measurement
A measurement of SP100-specific antibodies in a biological specimen.
Follicular Helper T-Lymphocyte Subpopulation to Helper T-Lymphocyte Subpopulation Ratio Measurement
The determination of a sub-population of helper follicular T-lymphocytes to a sub-population of helper T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Terminal Memory Helper T-Lymphocyte Subpopulation to Terminal Memory Helper T-Lymphocyte Subpopulation Ratio Measurement
The determination of a sub-population of helper terminal memory T-Lymphocytes to a sub-population of helper terminal memory T-Lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
BK Virus Viral Load Measurement
The determination of the amount of BK virus viral load present in a sample.
Rubeola Antigen Measurement
The determination of the Rubeola antigen present in a sample.
Plasma Cell to Class-switched Memory B-Lymphocyte Ratio Measurement
The determination of the ratio of plasma cells to class-switched memory B-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Conventional Naive T-Lymphocyte Subpopulation to Conventional Naive T-Lymphocyte Ratio Measurement
The determination of the ratio of a sub-population of conventional naive T-lymphocytes to conventional naive T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Apolipoprotein CI Measurement
The determination of the apolipoprotein CI present in a sample.
Micronucleated Cell Count
A measurement of the micronucleated cells in a biological specimen.
Hepatitis A Antibody Measurement
A quantitative measurement of the antibody reaction of a biological specimen to the Hepatitis A virus.
Leukocytes Corrected for Nucleated Erythrocytes Count
The determination of the amount of leukocytes, which has been corrected for nucleated erythrocytes, present in a sample.
Polysaccharides and Mucosubstances Measurement
The determination of the amount of polysaccharides and mucosubstances in a sample.
Gardnerella Measurement
The determination of the amount of organisms in a sample that are assigned to the Gardnerella genus.
BTA Stat Assay
An immunoassay that detects bladder cancer antigen, which is comprised of various members of the complement factor H-related protein (CFHrp) family, in urine.
Helper T-Lymphocyte to Lymphocyte Ratio Measurement
The determination of the ratio of T-lymphocytes helper to lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Prostaglandin E Synthase Measurement
The determination of the amount of the prostaglandin E synthase in a sample.
Vitamin Measurement
The determination of the type and amount of vitamins in a sample.
CD107a Expression Measurement
The determination of cellular CD107a expression in a biospecimen.
Streptococcus agalactiae Measurement
The determination of the amount of Streptococcus agalactiae present in a sample.
