Elisa kits are enzyme-linked immunosorbent assay (ELISA) is a biochemical procedure in immunology that is primarily used for determining the presence of an antigen or an antibody in a sample. For years, ELISA has been utilized as a diagnostic tool in plant pathology and medicine. It has test kits that are used for cancer, autoimmune diseases, fertility, thyroid, steroid, infectious diseases and parasitology, allergy, and diabetes assays.