Keystone Biologicals Corp is a distributor of disease-state plasma, serum and controls. It serves clientele in the diagnostic and biotechnology industries, such as autoimmune disease markers, immunology, serology and virology. The company offers quality control panels, validation panels, in-house testing and screening and custom processing. Specific markers covered include hepatitis, streptolysin, cardiolipin, c-reactive protein, cytomegalovius, Epstein-Barr virus, herpes I and II, mononucleosis, rubella, rubeola, syphilis, systemic lupus, toxoplasmosis and varicella zoster.