The ELISA (enzyme-linked immunosorbent assay) is a test which uses color change and antibodies to identify a substance. An indirect ELISA is one of three ELISA tests.
Urine varies in appearance, depending principally upon a body's level of hydration, as well as other factors. Normal urine is a transparent solution ranging from colorless to amber but is usually a pale yellow. In the urine of a healthy individual the color comes primarily from the presence of urobilin.
Deep yellow urine: Introduction. Deep yellow urine: Deep yellow urine is urine that is dark yellow. See detailed information below for a list of 8 causes of Deep yellow urine, Symptom Checker, including diseases and drug side effect causes.Â» Review Causes of Deep yellow urine: Causes | Symptom Checker Â».eep yellow urine: Introduction. Deep yellow urine: Deep yellow urine is urine that is dark yellow. See detailed information below for a list of 8 causes of Deep yellow urine, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Deep yellow urine: Causes | Symptom Checker Â».