Medical diagnostic test kits for the quantitative determination of histamine for medical purposes comprised of histamine anti-serum, diluent, acylation reagent, enzyme conjugate, enzyme substrate, stop solution, histamine microtiter strips, acylation buffer, calibration substances consisting of fixed concentrations of histamine, and control substances consisting of fixed concentrations of histamine, reaction plate, and wash buffer concentrate; Chemicals for medical purposes, namely, for the q...