Spectrum Health Care is a member of the Spectrum Group of Companies, headquartered in Tempe, Arizona; an organization that since its inception has grown to be a leading diagnostic and allergy treatment company with worldwide presence.

The in-vitro (blood) allergy test has been available since 1971, with the introduction of the RAST (Radioallergosorbant Test) program. A number of years later ELISA (Enzyme linked Immunosorbant Assay) was made available. Both methods are similar, one using radioisotopes and the other an enzyme color reaction as its means of quantification.

The research and development team at Spectrum has combined the most reliable aspects of each method to bring you the SPOT Test; the most reliable and advanced in-vitro test available today.