<prompt> Rapid serological diagnostic tests include all except -Latex agglutinationSpectrophometryGel electrophoresisRadioimmunoassay  <response>: Spectrophotometry is not a rapid serological test it is a quantitative measurement of the reflection or transmission propeies of a material as a function of wavelength. A spectrophotometer is commonly used for the measurement of transmittance or reflectance of solutions, transparent or opaque solids, such as polished glass, or gases. Ref: 