<unk>  is a technique for counting, examining, and sorting microscopic particles suspended in a stream of fluid. It allows simultaneous multiparametric analysis of the physical and/or chemical characteristics of single cells<unk> ing through an optical and/or electronic detection apparatus.
Flow cytometry
Direct fluorescent antibody
Immunofluorescence
Enzyme linked immunosorbent assay 
Enzyme assay
Interferon-γ release assays
Latex fixation test
Counterimmunoelectrophoresis