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.
Normal cat urine consists of ammonia, urea, water, sodium, chloride, uric acid, phosphate, sulphate and creatinine. A catâs urine should be a shade of yellow, depending on his water intake. If the color or smell of a catâs urine is not normal, something is wrong.Urine thatâs brown or has any red coloring in it means thereâs blood in the urine. Urine that is yellow with a greenish tint will point to liver problems. If a catâs urine smells strongly of ammonia, this would indicate a bacterial infection.ormal cat urine consists of ammonia, urea, water, sodium, chloride, uric acid, phosphate, sulphate and creatinine. A catâs urine should be a shade of yellow, depending on his water intake. If the color or smell of a catâs urine is not normal, something is wrong.