Detection kit refers to the diagnostic reagent prepared by the principles or methods of immunology, microbiology and molecular biology and used in vitro for the diagnosis, detection and epidemiological investigation of human diseases.Detection kit can be divided into in vivo diagnostic reagents and in vitro diagnostic reagents.

In addition to the in detection kit used for diagnosis, such as old tuberculin, Brucellin and Sikh toxin, most of them are in vitro diagnostic products.